Texas Instruments TI-84 PLUS - Graphing Calculator User Manual

Chapter 3: Function Graphing 90
‰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=1âL3.
To find the numerical integral 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.

Texas Instruments TI-84 PLUS - Graphing Calculator Specifications

General

Type	Graphing Calculator
Display Type	LCD
Screen Resolution	96 x 64 pixels
Processor	Zilog Z80
Memory	24 KB RAM, 480 KB Flash ROM
Power Source	4 AAA batteries (with backup lithium battery)
Connectivity	I/O port
Weight	7.4 oz (210 g)
Software	TI-OS (Texas Instruments Operating System)