Casio fx-115ES PLUS - Manual (Page 47)

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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 Ч 6)  (2 + 6) Ч 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.
Expression Input Precautions
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)
Math Math