Inequality Calculations (Ineq) - Casio fx-991ZA PLUS II User Manual

x = binomial probability of 12 ≒ 0,063388
x = binomial probability of 13 ≒ 0,021942
x = binomial probability of 14 ≒ 4,7018 × 10
• Pressing returns to the N input screen. Pressing
List Screen (input data samples are stored).
Note
• The following cannot be used in the distribution calculations: Pol, Rec, ÷R, ∫, d/dx.
• When data is specified using parameter format, calculation results are stored in Ans
memory.
• An error message appears if the input value is outside the allowable range. "ERROR"
will appear in the Ans column of the List Screen when the value input for the
corresponding sample data is outside the allowable range.

Inequality Calculations (INEQ)

You can use the following procedure to solve a quadratic inequality or
cubic inequality.
1. Press
2. On the menu that appears, select an inequality type.
To select this inequality
type:
Quadratic inequality
Cubic inequality
3. On the menu that appears, use keys
inequality symbol type and orientation.
4. Use the Coefficient Editor that appears to input coefficient values.
2
• To solve x + 2x - 3 < 0, for example, input the coefficients a = 1, b = 2,
c = -3 by pressing 1
• To change a coefficient value you already have input, move the cursor
to the appropriate cell, input the new value, and then press
(INEQ) to enter the INEQ Mode.
Press this key:
2
(aX
3
(aX
2 3
78
-3
returns to the
+ bX + c)
2
+ bX + cX + d)
through to select the
.
.