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4 February, 15:40

Let g (x) = 2x and h (x) = x^2+4. Find the value. (hg) (1)

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  1. 4 February, 18:20
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    G (x) = 2x h (x) = x² + 4

    h (g (x)) = h (2x)

    h (x) = x² + 4

    h (2x) = (2x) ² + 4 = 4x² + 4

    hg (1):

    hg (x) = h (g (x)) = 4x ² + 4

    hg (1) = 4*1 ² + 4 = 4 + 4 = 8

    hg (1) = 8
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