This is my second time posting. Thanks again for answering my first question.
This is my question:
Find the area above y = 0, from x = -1 to x = 1 of y = 2^x. Use subintervals of equal length. I started with this summation:
I am not sure where to go next. I was trying to factor using exponents laws to get the sum into a form so that a summation formula could be applied to get the sum into closed form. I do have the solution, but I don't understand how they got to the step right after this:
Here is the solution:
If anyone could help me, that would be fantastic.
Thank you guys for your time.