Casio fx-92B Collège 2D+ - Manual (Page 24)

E-23
To verify 0
8 3
9
8 2
9
–
( ) ( )
(VERIF)
0 (VERIFY) ()
8 9 C 8 9 C7
To verify 5
2
= 25 = 625
(VERIF)
5 7 (VERIFY) (=)
25
V() 625 U
Ratio Calculations (RATIO)
The RATIO Mode lets you determine the value of X in the ratio expression
a / b = X / d (or a / b = c / X) when the values of a , b , c and d are known. The
following shows the general procedure for using RATIO.
1. Press (RATIO) to enter the RATIO Mode.
2. On the menu that appears, select the (a/b=X/d) or (a/b=c/X).
3. On the Coefficient Editor screen that appears, input up to 10 digits for each
of the required values ( a , b , c , d ).
• To solve 3 / 8 = X / 12 for X, for example, press in step 1, and
then input the following for the coefficients ( a = 3, b = 8, d = 12):
3 8 12 .
• To change a coefficient value you already have input, move the cursor
to the appropriate cell, input the new value, and then press .
• Pressing will clear all of the coefficients to zero.
Note: The following operations are not supported by the Coefficient Editor:
;, ;(M–), B(STO). Pol, Rec, ÷R and multi-statements also
cannot be input with the Coefficient Editor.
4. After all the values are the way you want, press .
• This displays the solution (value of X). Pressing again will return to
the Coefficient Editor.
Important: A Math ERROR will occur if you perform a calculation while 0
is input for a coefficient.
Changing the Ratio Expression Type
Re-enter the RATIO Mode and select the ratio expression type you want
from the menu that appears. Changing the ratio expression type causes the
values of all Coefficient Editor coefficients to change to zero.
RATIO Mode Calculation Examples
To calculate X in the ratio 1 / 2 = X / 10
(RATIO)