Casio fx-115ES Manual De Usuario

E-46

2.  Input 4

'

9  = 12. 

4 

! 9 e1 6 (VERIFY) 1 (=)12 

•  You can select the equality symbol or 

inequality symbol from the menu that 
appears when you press 

16(VERIFY).

3. To verify, press 

=. 

 

You can input the following expressions for verification in the VERIFY 
Mode.

• Equalities or inequalities that include one relational operator 4 =  16, 

4 

 3, π  3, 1 + 2  5, (3 × 6)  (2 + 6) × 2, etc. 

• Equalities or inequalities that include multiple relational operators 1 

 1  

1 + 1, 3 

 π  4, 2

2

 = 2 + 2 = 4, 2 + 2 = 4 

 6, 2 + 3 = 5  2 + 5 = 8, etc.

Note:  • The verification result will cause 1 to be assigned to Ans memory 
when TRUE and 0 when FALSE. • The input expression can be a total of 
99 bytes, including the left side, right side, and relational operators. • Any 
variable (A, B, C, D, E, F, X, Y, M) input into an expression is treated as a 
value, using the value currently assigned to the variable. • ÷R, Pol and Rec 
functions cannot be used in an expression. 

In the VERIFY Mode, the calculator performs a mathematical operation 
on the input expression and then displays TRUE or FALSE based on the 
result. Because of this, calculation error can occur or a mathematically 
correct result may not be able to be displayed when the input calculation 
expression includes calculation that approaches the singular point or 
inflection point of a function, or when the input expression contains multiple 
calculation operations.

The following types of expressions cause a Syntax ERROR and cannot 
be verified.
• An expression with nothing on the left side or right side (Example: = 5

'

7 )

• An expression in which a relational operator is inside of a fraction or function 

(Example:  1 = 1

2

, cos (8 

 9))

• An expression in which a relational operator is enclosed in parentheses 

(Example: 8 

 (9  10)) 

• An expression in which multiple relational operators that are not oriented 

in the same direction (Example: 5 

 6  4) 

• An expression that contains two of the following operators in any combination 

(Example: 4 

 6  8) 

• An expression that contains consecutive relational operators 

(Example: 5 

 9)