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6 February, 19:40

For the function f (x) = x + 9, find (f o f-1) (5) A. 14 B. 5 C. - 5 D. 25

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  1. 6 February, 19:48
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    F-1:

    y=x+9

    y-9=x

    x-9=f-1

    f-1 (14) = 14-9=5 f-1 (5) = 5-9=-4 f-1 (-5) = - 5-9=-14 f-1 (25) = 25-9=16

    f (14) = 14+9=24 f (5) = 5+9=14 f (-5) = 9-5=4 f (25) = 25+9=34
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