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

  1. Feb 15, 2015 #1
    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. jcsd
  3. Feb 15, 2015 #2


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    Homework Helper

    I'm not exactly sure which part you're referring to. But 1 to any power (including 1-p) is just 1.
  4. Feb 16, 2015 #3
    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!
  5. Feb 16, 2015 #4


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    Science Advisor

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