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Homework Help: Simplifying exponents

  1. Aug 30, 2010 #1
    1. The problem statement, all variables and given/known data

    Attached is the problem, I dont like the math editor used on this site, so its a pdf. The only real problem I have is how to is how do you square a problem like square root of x over 2x?

    Attached Files:

  2. jcsd
  3. Aug 30, 2010 #2


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    Staff: Mentor

    Welcome to the PF.

    Since you are given [tex]f(x) = \frac{1}{\sqrt{x}}[/tex]

    and [tex]g(x) = x^2 - 5[/tex]

    what is f(g(x))? Wouldn't you substitute the g(x) term into the f(x) equation? Where do you get "square root of x over 2x"?
  4. Aug 31, 2010 #3
    Thanks for the help, bt the answers were multiple choice, and as it turns out the correct choice wasn't there. Thats what confused me. Sorry if i seemed a little confused, just I was bred on a calculator, and now my calc ab teacher wont let us use any type of calculator. So, 90% of the time my brain is fried.
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