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14 August, 17:19

For (x) = 2x+1 and g (x) = x^2-7, find (f o g) (2)

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  1. 14 August, 17:33
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    F (x) = 2x+1

    g (x) = x²-7,

    f o g (x) = 2 (x²-7) + 1=2x²-14+1=2x²-13

    f o g (2) = 2*2²-13=8-13=-5

    or

    g (2) = 4-7=-3

    f o g (2) = 2 * (-3) + 1=-5
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