# Homework Help: Confused at a fairly simple step in an improper integral

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1. Feb 15, 2015

### glmrkl

1. The problem statement, all variables and given/known data

http://puu.sh/fYQQj/12819720c6.png [Broken]
My question is in the attempt at the solution (Number 3)

2. Relevant equations

3. The attempt at a solution
I know how to get to lim t→∞ 1/(1-p) * (t^(1-p) - 1^(1-p)), I'm not sure what to do to get the 1 instead of 1^(1-p) in the above image

Last edited by a moderator: May 7, 2017
2. Feb 15, 2015

### Nathanael

I'm not exactly sure which part you're referring to. But 1 to any power (including 1-p) is just 1.

3. Feb 16, 2015

### glmrkl

I was referring to the part highlighted in red which is the simplified form after you solve the integral for x=t and x=1. I was wondering why they had just put 1 instead of 11-p

Well, this is embarrassing :(... thanks nonetheless!

4. Feb 16, 2015

### HallsofIvy

At least it lets the rest of us feel superior! (Until we make a similar careless mistake.)