Casio fx-115ES, fx-991ES Using VERIFY (VERIF), Special Solution Display

2x3 − 3 x2  0 B

Nc1(INEQ)2(aX3 + bX2 + cX + d) Math

3(aX3 + bX2 + cX + d  0) 2 =-3 =

=

3x3 + 3 x2 – x  0 B

Nc1(INEQ)2(aX3 + bX2 + cX + d) 1(aX3 + bX2 + cX + d  0)

3 =3 =-1 =

=

eee

Note: Solutions are displayed as shown here when Linear Display is selected.

Special Solution Display

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•“All Real Numbers” appears on the solution screen when the solution of an inequality is all numbers.

x2  0 B

Nc1(INEQ)1(aX2 + bX + c) 3(aX2 + bX + c  0)

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1 =0 =0 ==

•“No-Solution” appears on the solution screen when no solution exists for an inequality (such as X2 < 0).

Using VERIFY (VERIF)

VERIFY is a function you can use to verify whether an input equality or inequality is true (indicated by TRUE) or false (indicated by FALSE). The following shows the general procedure for using VERIFY.

To verify whether 4'9 = 12 is true B

1. Press Nc2(VERIF) to enter the VERIFY Mode.

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E-45