Casio fx-991EX User Manual

fx-991EX Quick Start Guide 5
...summation (sigma) notation,
qxIxd+1$-3$7=
…derivatives of a function at a specic point (value),
qyY4xd-5x$0.2=
…and denite integrals.
ya1$x$$2$5=.
Settings for the “Calculate” mode can be accessed by pressing
qp(SET UP).
Press R one or more times to reveal additional Setup options.
Solve x
2
+ Ax + Bx = 0 for x when A = 5 and B = 6.
Enter the equation by pressing, xd+Qz(A)
x+Qx(B) Qr(=)0.
SOLVE
The fx-991EX can elegantly solve an equation for any unknown using Newton’s method with the SOLVE command. To
use SOLVE, rst input the equation to be solved, then press qr(SOLVE).
CALCULATE

Casio fx-991EX Specifications

General

Type	Scientific
Cover	No
Form factor	Pocket
Control type	Buttons
Product color	Black, White
Battery type	LR44
Power source	Battery/Solar
Number of batteries supported	1
Digits	16 digits
Display type	LCD
Display resolution	192 x 63 pixels
Display number of lines	2 lines
Display number of characters	16
Storage media type	-
Operation	552
Conversion between	Decimal, Fraction, Percent
Convert angles from degrees to	Gradian, Radian
Random number/integer generator	Yes

Weight and Dimensions

Depth	165.5 mm
Width	77 mm
Height	11.1 mm
Weight	90 g