# Math Help - ti-89 integration help

1. ## ti-89 integration help

hello,

I'm having trouble with this integration problem.I am trying to integrate the equation in image two, and it comes out...weird the E is gone. I need the answer in the format of image one.I am really at a lost to why its doing that.

2. Originally Posted by infelix
hello,

I'm having trouble with this integration problem.I am trying to integrate the equation in image two, and it comes out...weird the E is gone. I need the answer in the format of image one.I am really at a lost to why its doing that.
Your calculator is obviously in approximate mode. Reset your calculator to exact mode.

3. Mode > F2 > Approx/Exact : switch to Exact instead of Auto.

Otherwise it's in this form because of the dot in -.1
If you don't want to switch the mode, write $\int$((10-10*e^(-x/10)),x)

and it will normally work.

4. hey thanks for the quick response and that did work.I just recently bought this is so i was not really sure where to look...again thanks!