# How do I find a definite integral on a TI-84?

Sep 25, 2014

A definite integral can be found on the TI-84 by 2 methods.

This can best be described by using an example.

${\int}_{0}^{5} x \mathrm{dx}$

Method 1:

Press the MATH button
Press 9 to get to the definite integral function

Use the arrow key to move the cursor

Enter the boundaries and function

Press ENTER to get the result

Method 2: Visual

Press the Y= button

Enter the function

Press the GRAPH button

Press 2ND button

Press TRACE button

Press 7 to get to the integration function

Enter the Lower Limit

In this example Press 0

Press Enter

Enter the Upper Limit

In this example Press 5

Press Enter

Watch the TI-84 shade in the region.

See the result, 12.5, and the interval, [0,5], at the bottom of TI-84 window.