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Powers and parantheses

  1. Jun 9, 2013 #1
    1. The problem statement, all variables and given/known data
    (27-3y6)1/3


    3. The attempt at a solution
    I THINK THIS IS HOW YOU SHOULD DO THIS:
    (1/273Y6)1/3

    My feeling is the (1/273) should still be evaluated. Yes?
     
    Last edited by a moderator: Jun 9, 2013
  2. jcsd
  3. Jun 9, 2013 #2
    Remember that ## (a^{x})^{y} = a^{xy} ## and ## a^{-x}=\frac{1}{a^x} ##

    How does this help you?
     
  4. Jun 9, 2013 #3

    lurflurf

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    Homework Helper

    Distribute the exponent

    $$(x^a \! y^b)^c=x^{a c} \! y^{b c} \\
    (5^8 \! s^4)^{(1/4)}=5^{8 (1/4)} \! s^{4 (1/4)}=5^2 \! s$$
     
  5. Jun 9, 2013 #4
    solution

    ok.
    I get y2/27
     
  6. Jun 9, 2013 #5
    You got it.
     
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