Using Solve; Solution Screen Contents; Continue Screen - Casio fx-115ES PLUS User Manual

To store A + Bi and then determine .f3 + i, 1 + .f3 i using polar
coordinates (r L9)
1m
f!2ID1IJ(CMPLX)
I
+
_..
m
~!BJ(A)(E~E3(B)~(/) A B.
rl..fJ
I!!!IIIJ(CMPLX)III(~rL9)
.
@!ID@3[D@1
@[
@!ID
(or @)1
@11iJ3[D@
[
To exij CALC:
tgj
Note: During the timefromwhenyou press
@!ID
untilyou exitCALCby
pressing tgj, you should use Linear Display input procedures for input.
...
21..301
21..601
~~~
SOLVE uses Newton's Law to approximate the solution of equations. Note
that SOLVE can be used in the COMP Mode (@!!1)III)only.
The following describes the types of equations whose solutions can be
obtained using SOLVE.
.
Equations
that Include variable X: X' + 2X
-
2, V = X + 5, X = sln(M), X
+3=B+C
SOLVE solves for X. An expression like X' + 2X
-
2 is treated as X' + 2X
-2 =0.
. Equations Input using the following syntax: (equation), (solution
variable)
SOLVE solves for V, for example, when an equation is input as: V = X + 5,
V
Important:
.
If an equation contains input functions that include an open
parenthesis (such as sin and log), do not omit the closing parenthesis.
.
The following functions are not allowed inside of an equation: I, dJdx, :E,
n, Pol, Rec, +R.
/
To solvey = a.x' +b for x when y = 0, a = 1, and b =-2
1!mi!I(§!g(Y)~@!ID(=)~!BJ(A)IY=AXZ+B m ...
I
~[D(X)@)(E~E3(B)
"'~""'~ .
-
11
Prompts for input of a value for Y Current value of Y
m M~th
0@1@!BJ2@,Solve for X
Current value of X
E-27
Input an initial value for X (Here, input 1):
m
~
1@1~~AXZi~414213562
L-R= 0
To exit SOLVE: tgj
Note: During the time from when you press I!!!I@!ID(SOLVE) until you exit
SOLVE by pressing tgj, you should use Linear Display input procedures
for input.
Important:
.
Depending on what you input for the initial value for X (solution
variable), SOLVE may not be able to obtain solutions. If this happens, try
changing the inijial value so they are closer to the solution.
.
SOLVE may not
be able to determine the correct solution, even when one exists.
.
SOLVE
uses Newton's law, so even if there are mulliple solutions, only one of them
wiil be returned.
.
Due to limitations in Newton's law, solutions tend to be
difficult to obtain for equations like the following: y = sin(x), y = c, y = rx.
Solution Screen Contents
Solutions are always displayed in decimal form.
Equation (The equation you input.)
Variable
solved for
Solution
(Left Side)
-
(Right Side) result
"(Left Side)
-
(Right Side) resull" shows the result when the right side of the
equation is subtracted from the left side, after assigning the obtained value
to the variable being solved for. The closer this result is to zero, the higher
the accuracy of the solution.
Continue Screen
SOLVE performs convergence a preset number of times. If it cannot find a
solution, it displays a confirmation screen that shows "Continue: [=)".asking
if you want to continue.
Press @ to continue or tgj to cancel the SOLVE operation.
/
Tosolvey=x'-x+ 1 forxwheny=3, 7, and 13
m
~
(§!g(Y)~
@!ID(=)
IY=XZ-X+
11
IimiiI(D(X)@)ElIimiiI
[D(X)(E 1
3@
,Solve formX
o
E-28
J