Does anyone know how to solve integral problems on a ti-84 calculator?

Question

jim_thompson5910 · Answer

you can only do numeric integration to get an approximate answer

you use the `fnint` function which stands for function integration

see attached to see an example

jim_thompson5910 · Answer

to get to the `fnInt` function, you 

step 1) hit the MATH key (under the blue 2ND key and the green ALPHA key)
step 2) scroll down to #9 or hit the 9 key as a shortcut

the template of the function is

fnInt( function, x, A, B )

where you replace "function" with the thing you want to integrate
x stays the same
A & B are the endpoints of integration

jim_thompson5910 · Answer

in my example I posted, I'm showing that

$$\Large \int_{3}^{7}x^2dx \approx 105.3333333$$

ngunn · Answer

thank you

jim_thompson5910 · Answer

you're welcome