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17 April, 12:43

If f (x) = √ x + 11, what is f (20) ?

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  1. 17 April, 13:06
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    2sqrt (5) + 11

    Step-by-step explanation:

    f (x) = sqrt (x) + 11

    f (20) = sqrt (20) + 11

    f (20) = sqrt (4*5) + 11

    f (20) = sqrt (4) * sqrt (5) + 11

    f (20) = 2*sqrt (5) + 11
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