Casio CFX 9970G User Manual

1
Chapter  
Basic Operation  
1-1 Before Starting Calculations...  
1-2 Memory  
1-3 Option (OPTN) Menu  
1-4 Variable Data (VARS) Menu  
1-5 Program (PRGM) Menu  
Before Starting Calculations...  
1 - 1  
u To specify the number of significant digits (Sci)  
Example  
To specify three significant digits  
2 (Sci) 4 (3)  
Press the function key that corresponds to  
the number of significant digits you want to  
specify (n = 0 to 9).  
• Displayed values are rounded off to the number of significant digits you specify.  
• Specifying 0 makes the number of significant digits 10.  
u To specify the exponential display range (Norm 1/Norm 2)  
Press 3 (Norm) to switch between Norm 1 and Norm 2.  
Norm 1: 10–2 (0.01)>|x|, |x| >1010  
Norm 2: 10–9 (0.000000001)>|x|, |x| >1010  
u To specify the engineering notation display (Eng)  
Press 4 (Eng) to switch between engineering notation and standard notation.  
The indicator “/E” is on the display while engineering notation is in effect.  
The following are the 11 engineering notation symbols used by this calculator.  
Symbol  
Meaning  
Exa  
Unit  
1018  
1015  
1012  
109  
Symbol  
Meaning  
milli  
Unit  
10–3  
E
P
T
m
µ
n
p
f
Peta  
micro  
nano  
10–6  
10–9  
Tera  
G
M
k
Giga  
Mega  
kilo  
pico  
10–12  
10–15  
106  
femto  
103  
• The engineering symbol that makes the mantissa a value from 1 to 1000 is  
automatically selected by the calculator when engineering notation is in effect.  
15  
1 - 1 Before Starting Calculations...  
k Inputting Calculations  
When you are ready to input a calculation, first press A to clear the display.  
Next, input your calculation formulas exactly as they are written, from left to right,  
and press w to obtain the result.  
Example 1 2 + 3 – 4 + 10 =  
Ac+d-e+baw  
Example 2 2(5 + 4) ÷ (23 × 5) =  
Ac(f+e)/  
(cd*f)w  
k Calculation Priority Sequence  
This calculator employs true algebraic logic to calculate the parts of a formula in  
the following order:  
1 Coordinate transformation Pol (x, y), Rec (r, θ)  
Differentials, quadratic differentials, integrations, Σ calculations  
2
2
d/dx, d /dx , dx, Σ, Mat, Solve, FMin, FMax, ListMat, Fill, Seq, SortA, SortD,  
Min, Max, Median, Mean, Augment, MatList, List  
ALGBR Mode unique commands  
expand(, factor(, tExpand(, tCollect(, (, diff(, solve(, tanLine(, collect(,  
combine(, sequence(, sumSeq(, expToTrig(, trigToExp(, signum(  
2 Type A functions  
With these functions, the value is entered and then the function key is pressed.  
2
–1  
x , x , x !, ° ’ ”, ENG symbols  
3 Power/root ^(xy), x  
4 Fractions ab/c  
5 Abbreviated multiplication format in front of π, memory name, or variable name.  
2π, 5A, X min, F Start, etc.  
6 Type B functions  
With these functions, the function key is pressed and then the value is entered.  
3
,
, log, In, ex, 10x, sin, cos, tan, sin–1, cos–1, tan–1, sinh, cosh, tanh, sinh–1,  
cosh–1, tanh–1, (–), d, h, b, o, Neg, Not, Det, Trn, Dim, Identity, Sum, Prod,  
Cuml, Percent, AList  
7 Abbreviated multiplication format in front of Type B functions  
2 3, A log2, etc.  
8 Permutation, combination nPr, nCr  
9 × , / (÷)  
0 +, –  
16  
Before Starting Calculations...  
1 - 1  
! Relational operator  
=, , >, <, , ≤  
G
@ And, and  
# Or, or, xor, xnor  
• Execution is normally performed from left to right, except in the following cases  
when it is performed from right to left.  
·When functions with the same priority are used in series:  
exIn 120 ex{In( 120)}  
·When power calculations are used in series in the ALGBR Mode:  
[5^3^2 5^(3^2)]  
·To produce the same result in the RUN Mode, the above calculation should  
be input: (5^3)^2  
• Compound functions are executed from right to left.  
• Anything contained within parentheses receives highest priority.  
2
Example  
2 + 3 × (log sin2π + 6.8) = 22.07101691 (angle unit = Rad)  
1
2
3
4
5
6
k Multiplication Operations without a Multiplication Sign  
You can omit the multiplication sign (×) in any of the following operations.  
Example  
2sin30, 10log1.2, 2 , 2Pol(5, 12), etc.  
3
• Before constants, variable names, memory names  
Example 2π, 2AB, 3Ans, 3Y1, etc.  
• Before an open parenthesis  
Example 3(5 + 6), (A + 1)(B – 1), etc.  
17  
1 - 1 Before Starting Calculations...  
k Stacks  
The unit employs memory blocks, called stacks, for storage of low priority values  
and commands. There is a 10-level numeric value stack, a 26-level command  
stack, and a 10-level program subroutine stack. An error occurs if you perform a  
calculation so complex that it exceeds the capacity of available numeric value  
stack or command stack space, or if execution of a program subroutine exceeds  
the capacity of the subroutine stack.  
Example  
Numeric Value Stack  
Command Stack  
1
b
2
×
(
2
c
3
3
d
4
(
4
e
5
+
5
f
4
×
g
h
(
+
P.16  
P.20  
• Calculations are performed according to the priority sequence. Once a  
calculation is executed, it is cleared from the stack.  
• Storing a complex number takes up two numeric value stack levels.  
• Storing a two-byte function takes up two command stack levels.  
k Input, Output and Operation Limitations  
The allowable range for both input and output values is 10 digits for the mantissa  
and 2 digits for the exponent. Internally, however, the unit performs calculations  
using 15 digits for the mantissa and 2 digits for the exponent.  
Example  
3 × 105 ÷ 7 – 42857 =  
AdEf/hw  
dEf/h-  
ecifhw  
18  
Before Starting Calculations...  
1 - 1  
k Overflow and Errors  
Exceeding a specified input or calculation range, or attempting an illegal input  
causes an error message to appear on the display. Further operation of the  
calculator is impossible while an error message is displayed. The following events  
cause an error message to appear on the display.  
• When any result, whether intermediate or final, or any value in memory  
exceeds ±9.999999999 × 1099 (Ma ERROR).  
P.453  
• When an attempt is made to perform a function calculation that exceeds the  
input range (Ma ERROR).  
• When an illegal operation is attempted during statistical calculations (Ma  
ERROR). For example, attempting to obtain 1VAR without data input.  
• When the capacity of the numeric value stack or command stack is exceeded  
(Stk ERROR). For example, entering 25 successive ( followed by 2 + 3 *  
4 w.  
• When an attempt is made to perform a calculation using an illegal formula (Syn  
ERROR). For example, 5 ** 3 w.  
• When you try to perform a calculation that causes memory capacity to be  
exceeded (Mem ERROR).  
• When you use a command that requires an argument, without providing a valid  
argument (Arg ERROR).  
• When an attempt is made to use an illegal dimension during matrix calculations  
(Dim ERROR).  
• When no solution exists for an ALGBR Mode operation (Undefined).  
• When the result of an ALGBR Mode operation exceeds the range of the  
calculator (Overflow ERROR).  
• When a value input in the ALGBR Mode is outside the domain of the operation  
being performed (Domain ERROR).  
• When an ALGBR Mode operation in which only real numbers have been input  
produces a result that is a complex number while the set up screen's Answer  
Type item is specified as "Real" (Non-Real ERROR).  
P.7  
• When no solution can be obtained using the Solve Function in the ALGBR  
Mode (No Solution).  
• When an attempt is made to use approx with an expression that generates an  
error unique to the ALGBR Mode (Ma ERROR).  
• Other errors can occur during program execution. Most of the calculator’s keys  
are inoperative while an error message is displayed. You can resume operation  
using one of the two following procedures.  
P.450  
P.41  
• Press the A key to clear the error and return to normal operation.  
• Press d or e to display the error.  
19  
1 - 1 Before Starting Calculations...  
k Memory Capacity  
Each time you press a key, either one byte or two bytes is used. Some of the  
functions that require one byte are: b, c, d, sin, cos, tan, log, In,  
, and π.  
Some of the functions that take up two bytes are d/dx(, Mat, Xmin, If, For, Return,  
DrawGraph, SortA(, PxIOn, Sum, and an+1.  
When the number of bytes remaining drops to five or below, the cursor automati-  
cally changes from “ _ ” to “ ”. If you still need to input more, you should divide  
v
your calculation into two or more parts.  
• As you input numeric values or commands, they appear flush left on the dis-  
play. Calculation results, on the other hand, are displayed flush right, except in  
the ALGBR Mode.  
k Graphic Display and Text Display  
The unit uses both a graphic display and a text display. The graphic display is  
used for graphics, while the text display is used for calculations and instructions.  
The contents of each type of display are stored in independent memory areas.  
uTo switch between the graphic display and text display  
Press !6(G T). You should also note that the key operations used to clear  
each type of display are different.  
uTo clear the graphic display  
Press !4(Sketch) 1(Cls) w.  
uTo clear the text display  
Press A.  
k Editing Calculations  
Use the d and e keys to move the cursor to the position you want to change,  
and then perform one of the operations described below. After you edit the  
calculation, you can execute it by pressing w, or use e to move to the end of  
the calculation and input more.  
uTo change a step  
Example  
To change cos60 to sin60  
cga  
ddd  
s
20  
Before Starting Calculations...  
1 - 1  
uTo delete a step  
Example  
To change 369 × × 2 to 369 × 2  
dgj**c  
ddD  
uTo insert a step  
Example  
To change 2.362 to sin2.362  
c.dgx  
ddddd  
![  
s
• When you press ![ the insert location is indicated by the symbol ‘‘t’’.  
The next function or value you input is inserted at the location of ‘‘t’’. To abort  
the insert operation without inputting anything, move the cursor, press ![  
again, or press d, e or w.  
21  
1-2 Memory  
k Variables  
This calculator comes with 28 variables as standard. You can use variables to  
store values to be used inside of calculations. Variables are identified by single-  
letter names, which are made up of the 26 letters of the alphabet, plus r and θ.  
The maximum size of values that you can assign to variables is 15 digits for the  
mantissa and 2 digits for the exponent. Variable contents are retained even when  
you turn power off.  
uTo assign a value to a variable  
[value] a [variable name] w  
Example  
To assign 123 to variable A  
AbcdaaAw  
Example  
To add 456 to variable A and store the result in variable B  
AaA+efgaaBw  
uTo display the contents of a variable  
Example  
To display the contents of variable A  
AaAw  
uTo clear a variable  
Example  
To clear variable A  
AaaaAw  
To clear all variables, select “Memory Usage” from the SYS Mode.  
uTo assign the same value to more than one variable  
[value]a [first variable name]a3(~) [last variable name]w  
You cannot use r” or “θ” as a variable name in the above operation.  
Example  
To assign a value of 10 to variables A through F  
Abaa!aA  
3(~)Fw  
22  
Memory  
1 - 2  
k Function Memory  
[OPTN]-[FMEM]  
Function memory is convenient for temporary storage of often-used expressions.  
For longer term storage, we recommend that you use the GRAPH Mode for  
expressions and the PRGM Mode for programs.  
P.27  
• {STO}/{RCL}/{fn}/{SEE} ... {function store}/{function recall}/{function area  
specification as a variable name inside an expression}/{function list}  
uTo store a function  
Example  
To store the function (A+B) (A–B) as function memory number 1  
K6(g)6(g)3(FMEM)A  
(aA+aB)  
(aA-aB)  
1(STO) 1(f1  
)
• If the function memory number you assign a function to already contains a  
function, the previous function is replaced with the new one.  
uTo recall a function  
Example  
To recall the contents of function memory number 1  
K6(g)6(g)3(FMEM)A  
2(RCL)1(f1  
)
• The recalled function appears at the current location of the cursor on the  
display.  
uTo display a list of available functions  
K6(g)6(g)3(FMEM)  
4(SEE)  
23  
1 - 2 Memory  
uTo delete a function  
Example  
To delete the contents of function memory number 1  
K6(g)6(g)3(FMEM)A  
1(STO) 1(f1  
)
• Executing the store operation while the display is blank deletes the function in  
the function memory you specify.  
uTo use stored functions  
Once you store a function in memory, you can recall it and use it for a calculation.  
This feature is very useful for quick and easy input of functions when programming  
or graphing.  
Example  
To store x3 + 1, x2 + x into function memory, and then graph:  
y = x3 + x2 + x + 1  
Use the following View Window parameters.  
Xmin = –4  
Ymin = –10  
Xmax  
=
4
1
Ymax  
=
10  
1
Xscale =  
Yscale =  
!Zc1(Y=)JK6(g)6(g)3(FMEM)  
AvMd+b1(STO)1(f1)(stores (x3 + 1))  
Avx+v1(STO)2(f2)(stores (x2 + x))  
A!4(Sketch)1(Cls)w  
!4(Sketch)5(GRPH)1(Y=)  
K6(g)6(g)3(FMEM)  
3(fn)1(f1)+2(f2)w  
P.111  
• For full details about graphing, see “8. Graphing”.  
k Memory Status  
You can check how much memory is used for storage for each type of data. You  
can also see how many bytes of memory are still available for storage.  
uTo check the memory status  
1. In the Main Menu, select the SYS icon and  
press w.  
24  
Memory  
1 - 2  
2. Press c w to display the memory status  
screen.  
Number of bytes still free  
3. Use f and c to move the highlighting and view the amount of memory (in  
bytes) used for storage of each type of data.  
The following table shows all of the data types that appear on the memory status  
screen.  
Data Type  
Program  
Meaning  
Program data  
Statistics  
Matrix  
Statistical calculations and graphs  
Matrix memory data  
List data  
List File  
Y=  
Graph functions  
Draw Memory  
Graph drawing conditions (View Window,  
enlargement/reduction factor, graph screen)  
Graph Memory  
View Window  
Picture  
Graph memory data  
View Window memory data  
Graph screen data  
Dynamic Graph  
Table  
Dynamic Graph data  
Function Table & Graph data  
Recursion Table & Graph data  
Equation calculation data  
Alpha memory data  
Recursion  
Equation  
Alpha Memory  
Function Mem  
Financial  
Function memory data  
Financial data  
25  
1 - 2 Memory  
k Clearing Memory Contents  
Use the following procedure to clear data stored in memory.  
1. In the memory status screen, use f and c to move the highlighting to the  
data type you want to clear.  
If the data type you select in step 1 allows deletion of specific data  
2. Press 1 (DEL).  
1 2 3 4 5 6  
* This menu appears when you  
select List File.  
3. Press the function key that corresponds to the data you want to delete.  
1
2 3 4 5 6  
• The above example shows the function menu that appears when you highlight  
{List File} in step 1.  
4. Press 1 (YES).  
If the data type you select in step 1 allows deletion of all data only  
2. Press 1 (DEL).  
1
2 3 4 5 6  
3. Press 1 (YES) to delete all of the data.  
26  
1-3 Option (OPTN) Menu  
The option menu gives you access to scientific functions and features that are not  
marked on the calculator’s keyboard. The contents of the option menu differ  
according to the mode you are in when you press the K key.  
See the Command List at the back of this user’s guide for details on the option  
(OPTN) menu.  
uOption Menu in the RUN and PRGM Modes  
P.237  
P.88  
• {LIST} ... {list function menu}  
• {MAT} ... {matrix operation menu}  
P.68  
• {CPLX} ... {complex number calculation menu}  
• {CALC} ... {functional analysis menu}  
• {STAT} ... {paired-variable statistical estimated value menu}  
• {COLR} ... {graph color menu}  
P.271  
P.43  
P.43  
P.43  
P.44  
• {HYP} ... {hyperbolic calculation menu}  
• {PROB} ... {probability/distribution calculation menu}  
• {NUM} ... {numeric calculation menu}  
• {ANGL} ... {menu for angle/coordinate conversion, sexagesimal input/  
conversion}  
P.44  
P.139  
P.23  
• {ESYM} ... {engineering symbol menu}  
• {PICT} ... {graph save/recall menu}  
• {FMEM} ... {function memory menu}  
• {LOGIC} ... {logic operator menu}  
P.51  
Pressing K causes the following function key menu to appear while binary,  
octal, decimal, or hexadecimal is set as the default number system.  
• {COLR} ... {graph color menu}  
uOption Menu during numeric data input in the STAT, MAT, LIST,  
TABLE, RECUR and EQUA Modes  
• {LIST}/{HYP}/{PROB}/{NUM}/{ANGL}/{ESYM}/{FMEM}/{LOGIC}  
uOption Menu during formula input in the GRAPH, DYNA, TABLE,  
RECUR and EQUA Modes  
• {List}/{CALC}/{HYP}/{PROB}/{NUM}/{FMEM}/{LOGIC}  
uOption Menu during expression input in the ALGBR Mode  
• {Abs}/{HYP}/{ i }/{x!}/{sign}/{FMEM}  
The meanings of the option menu items are described in the sections that cover  
each mode.  
27  
1-4 Variable Data (VARS) Menu  
To recall variable data, press J to display the variable data menu.  
{V-WIN}/{FACT}/{STAT}/{GRPH}/{DYNA}/{TABL}/{RECR}/{EQUA}/{TVM}  
See the Command List at the back of this user’s guide for details on the variable  
data (VARS) menu.  
• Note that the EQUA and TVM items appear for function keys (3 and 4)  
only when you access the variable data menu from the RUN or PRGM Mode.  
• The variable data menu does not appear if you press J while binary, octal,  
decimal, or hexadecimal is set as the default number system.  
k V-WIN — Recalling View Window values  
Selecting {V-WIN} from the VARS menu displays the View Window value recall  
menu.  
P. 11 3  
u {X}/{Y}/{T,θ } ... {x-axis menu}/{y-axis menu}/{T, θ menu}  
u {R-X}/{R-Y}/{R-T,θ} ... {x-axis menu}/{y-axis menu}/{T,θ menu} for right side  
of Dual Graph  
The following are the items that appear in the above menus.  
• {min}/{max}/{scal}/{ptch} ... {minimum value}/{maximum value}/{scale}/  
{pitch}  
k FACT — Recalling enlargement/reduction factors  
Selecting {FACT} from the VARS menu displays the enlargement/reduction factor  
recall menu.  
P.134  
• {Xfct}/{Yfct} ... {x-axis factor}/{y-axis factor}  
k STAT — Recalling Single/Paired-variable Statistical Data  
Selecting {STAT} from the VARS menu displays the single/paired-variable  
statistical data recall menu.  
{X}/{Y}/{GRPH}/{PTS}/{TEST}/{RESLT}  
u {X}/{Y} ... {x-data menu}/{y-data menu}  
The following are the items that appear in the above menus.  
• {n} ... {number of data}  
• {o}/{p} ... mean of {x-data}/{y-data}  
• {Σx}/{Σy} ... sum of {x-data}/{y-data}  
• {Σx2}/{Σy2} ... sum of squares of {x-data}/{y-data}  
• {Σxy} ... {sum of products of x-data and y-data}  
P.259  
P.267  
28  
Variable Data (VARS) Menu  
1 - 4  
• {xσn}/{yσn} ... population standard deviation of {x-data}/{y-data}  
• {xσn-1}/{yσn-1} ... sample standard deviation of {x-data}/{y-data}  
• {minX}/{minY} ... minimum value of {x-data}/{y-data}  
• {maxX}/{maxY} ... maximum value of {x-data}/{y-data}  
u {GRPH} ...{graph data menu}  
The following are the items that appear in the above menu.  
• {a}/{b}/{c}/{d}/{e} ... {regression coefficient and multinomial coefficients}  
• {r} ... {correlation coefficient}  
• {Q1}/{Q3} ... {first quartile}/{third quartile}  
• {Med}/{Mod} ... {median}/{mode} of input data  
• {Strt}/{Pitch} ... histogram {start division}/{pitch}  
• {Iter}/{Perid} ... sine regression {number of iterations}/{period}  
u {PTS} ... {summary point data menu}  
The following are the items that appear in the above menu.  
• {x1}/{y1}/{x2}/{y2}/{x3}/{y3} ... {coordinates of summary points}  
u {TEST} ... {test data recall}  
The following are the items that appear in the above menu.  
• {n}/{o}/{xσn-1} ... {number of data}/{data mean}/{sample standard deviation}  
• {n1}/{n2} ... number of {data 1}/{data 2}  
• {o1}/{o2} ... mean of {data 1}/{data 2}  
• {x1σ}/{x2σ} ... sample standard deviation of {data 1}/{data 2}  
• {xpσ} ... {pooled sample standard deviation}  
• {F} ... {F value}  
• {Fdf}/{SS}/{MS} ... factor {degrees of freedom}/{sum of squares}/{mean of  
squares}  
• {Edf}/{SSe}/{MSe} ... error {degrees of freedom}/{sum of squares}/{mean of  
squares}  
u {RESLT} ... {test result recall}  
The following are the items that appear in the above menu.  
• {p} ... {p value}  
2
• {z}/{t}/{Chi}/{F} ... {Z test results}/{t test results}/{χ test results}/{F test  
results}  
• {Left}/{Right} ... {interval lower limit (left edge)}/{interval upper limit (right  
edge)}  
• {pˆ }/{pˆ 1}/{pˆ2} ... {expected probability value}/{expected probability value 1}/  
{expected probability value 2}  
• {df}/{s}/{r}/{r2} ... {degrees of freedom}/{standard error}/{correlation  
coefficient}/{coefficient of determination}  
29  
1 - 4 Variable Data (VARS) Menu  
k GRPH — Recalling Graph Functions  
Selecting {GRPH} from the VARS menu displays the graph function recall menu.  
P.156  
• {Y}/{r} ... {rectangular coordinate or inequality function}/{polar coordinate  
function}  
• {Xt}/{Yt} ... parametric graph function {Xt}/{Yt}  
• {X} ... {X=constant graph function}  
(Press these keys before inputting a value to specify a storage area.)  
Example  
To recall and draw the graph for the rectangular coordinate  
function y = 2 x2 – 3, which is stored in storage area Y2  
Use the following View Window parameters to draw the graph.  
Xmin = –5  
Ymin = –5  
Xmax  
=
5
1
Ymax  
=
5
1
Xscale =  
Yscale =  
!4(Sketch)5(GRPH)1(Y=)  
J4(GRPH)1(Y)cw  
k DYNA — Recalling Dynamic Graph Set Up Data  
Selecting {DYNA} from the VARS menu displays the Dynamic Graph set up data  
recall menu.  
• {Strt}/{End}/{Pitch} ... {coefficient range start value}/{coefficient range end  
P.185  
P.207  
value}/{coefficient value increment}  
k TABL — Recalling Table & Graph Set Up and Content Data  
Selecting {TABL} from the VARS menu displays the Table & Graph set up and  
content data recall menu.  
• {Strt}/{End}/{Pitch} ... {table range start value}/{table range end value}/{table  
value increment}  
• {Reslt} ... {matrix of table contents}  
• The Reslt item appears for function key 4 only when the above menu is  
displayed in the RUN or PRGM Mode.  
30  
Variable Data (VARS) Menu  
1 - 4  
Example  
To recall the contents of the numeric table for the function  
y = 3x – 2, while the table range is Start=0 and End=6, and pitch=1  
2
4(Reslt)w  
k RECR — Recalling Recursion Formula, Table Range, and  
Table Content Data  
Selecting {RECR} from the VARS menu displays the recursion data recall menu.  
u {FORM} ... {recursion formula data menu}  
The following are the items that appear in the above menu.  
P.218  
P.219  
• {an}/{an+1}/{an+2}/{bn}/{bn+1}/{bn+2} ... {an}/{an+1}/{an+2}/{bn}/{bn+1}/{bn+2}  
expressions  
u {RANG} ... {table range data menu}  
The following are the items that appear in the above menu.  
• {Strt}/{End} ... {table range start value}/{table range end value}  
• {a0}/{a1}/{a2} ... {zero term ao value}/{first term a1 value}/{second term a2  
value}  
• {b0}/{b1}/{b2} ... {zero term bo value}/{first term b1 value}/{second term b2  
value}  
• {anSt}/{bnSt} ... origin of {an }/{bn} recursion formula convergence/divergence  
graph (WEB graph)  
u {Reslt} ... {matrix of table contents}  
Selecting {Reslt} displays a matrix that shows the contents of the recursion table.  
• This operation is available only in the RUN and PRGM modes.  
Example  
To recall the contents of the numeric table for recursion formula  
= 2n + 1, while the table range is Start=1 and End=6  
a
n
3(Reslt)w  
31  
1 - 4 Variable Data (VARS) Menu  
• The table contents recalled by the above operation are stored automatically in  
Matrix Answer Memory (MatAns).  
• An error occurs if you perform the above operation when there is no function or  
recursion formula numeric table in memory.  
k EQUA — Recalling Equation Coefficients and Solutions  
Selecting {EQUA} from the VARS menu displays the equation coefficient and  
solution recall menu.  
• {S-Rlt}/{S-Cof} ... matrix of {solutions}/{coefficients} for linear equations with  
P.101  
P.104  
two through six unknowns  
• {P-Rlt}/{P-Cof} ... matrix of {solution}/{coefficients} for a quadratic or cubic  
equation  
Example 1 To recall the solutions for the following linear equations with two  
unknowns  
2x + 3y =  
8
3x + 5y = 14  
1(S-Rlt)w  
Example 2 To recall the coefficients for the following linear equations with  
three unknowns  
4x + y – 2z = –1  
x + 6y + 3z =  
1
–5x + 4y + z = –7  
2(S-Cof)w  
Example 3 To recall the solutions for the following quadratic equation  
2
2x + x – 10 = 0  
3(P-Rlt)w  
Example 4 To recall the coefficients for the following quadratic equation  
2
2x + x – 10 = 0  
4(P-Cof)w  
32  
Variable Data (VARS) Menu  
1 - 4  
• The coefficients and solutions recalled by the above operation are stored  
automatically in Matrix Answer Memory (MatAns).  
• When the solutions for a linear equation with 2 through 6 unknowns contain  
complex numbers, only the real number parts are stored in Matrix Answer  
Memory (MatAns).  
• Coefficient and solution memory data for a linear equation with 2 though 6  
unknowns cannot be recalled at the same time.  
• The following conditions cause an error to be generated.  
— When there are no coefficients input for the equation  
— When there are no solutions obtained for the equation  
k TVM — Recalling Financial Calculation Data  
Selecting {TVM} from the VARS menu displays the financial calculation data recall  
menu.  
• {n}/{I%}/{PV}/{PMT}/{FV} ... {payment periods (installments)}/{interest (%)}/  
{present value}/{payment amount}/{future value}  
• {P/Y}/{C/Y} ... {number of installment periods per year}/{number of  
compounding periods per year}  
33  
1-5 Program (PRGM) Menu  
To display the program (PRGM) menu, first enter the RUN or PRGM Mode from  
the Main Menu and then press ! W. The following are the selections  
available in the program (PRGM) menu.  
• {COM} … {program command menu}  
• {CTL} … {program control command menu}  
• {JUMP} … {jump command menu}  
• {?} … {input command}  
• {^} … {output command}  
• {CLR} … {clear command menu}  
• {DISP} … {display command menu}  
• {REL} … {conditional jump relational operator menu}  
• {I/O} … {input/output control command menu}  
{:} … {multistatement connector}  
The function key menu appears if you press ! W in the RUN Mode or the  
PRGM Mode while binary, octal, decimal, or hexadecimal is set as the default  
number system.  
• {Prog}/{JUMP}/{?}/{^}/{REL}/{: }  
The functions assigned to the function keys are the same as those in the Comp  
Mode.  
For details on the commands that are available in the various menus you can  
access from the program menu, see “21. Programming”.  
P.365  
34  

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