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Help! composite and inverse functions (quite complex)?

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K(X) = (X/2-X),X not equal to 2. If K(a)=2, find a

I'm totally clueless!

Help would be much appreciated

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  1. K(X) = (X/2-X),X not equal to 2. If K(a)=2

    K(a) = (a/2 - a) = 2

    then

    a = 2(2-a)

    a = 4 - 2a

    3a = 4

    a = 4/3

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