Integral f(x)dx – Texas Instruments TI-83 PLUS User Manual
Page 156
TI-83 Plus
Function Graphing
153
To move to the same x-value for other selected functions, press
}
or
†
.
To restore the free-moving cursor, press
|
or
~
.
‰
f(x)dx
‰
f(x)dx
(numerical integral) finds the numerical integral of a function in a
specified interval. It uses the
fnInt(
function, with a tolerance of
H
=1
âL
3.
To find the numerical derivative of a function, follow these steps.
1. Select
7:
‰
f(x)dx
from the
CALCULATE
menu. The current graph is
displayed with
Lower Limit?
in the bottom-left corner.
2. Press
}
or
†
to move the cursor to the function for which you want
to calculate the integral.
3. Set lower and upper limits as you would set left and right bounds for
zero
. The integral value is displayed, and the integrated area is
shaded.
Note: The shaded area is a drawing. Use
ClrDraw
(Chapter 8) or any action
that invokes Smart Graph to clear the shaded area.