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Math Help - Help with Indices

  1. #1
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    Help with Indices

    Having some problems with simplifying these 2 equations. Can anyone help me? Thanks ...

    1.

    (x+y)^-1 + (x-y)^-1


    2.

    (27x^2)^1/3 / 1/3(x^3)^1/2

    Thanks again.
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  2. #2
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    Quote Originally Posted by slippy1 View Post
    Having some problems with simplifying these 2 equations. Can anyone help me? Thanks ...

    1.

    (x+y)^-1 + (x-y)^-1


    2.

    (27x^2)^1/3 / 1/3(x^3)^1/2

    Thanks again.
    Q1: Make the denominators the same, and simplify the numerator.

    Q2: Multiply the powers into the brackets and then simplify.
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  3. #3
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    Quote Originally Posted by knighty View Post
    Q1: Make the denominators the same, and simplify the numerator.

    Q2: Multiply the powers into the brackets and then simplify.
    Just to expand slightly on what's been said for Q1, first note that (x + y)^{-1} + (x - y)^{-1} = \frac{1}{x + y} + \frac{1}{x - y}.
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