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30 August, 04:32

If f (x) varies directly with x^2, and f (x) = 75 when x=5, find the value of f (8)

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  1. 30 August, 05:30
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    F (x) = x² + c

    f (5) = 25 + 50

    f (8) = 64 + 50 = 114
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