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12 March, 07:25

If f (x) = x2 + 2x, then find f (a+h) - f (a)

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  1. 12 March, 07:48
    Subsitute a+h for x and a for x

    f (a+h) - f (a) =

    (a+h) ^2+2 (a+h) - (a^2+2a)


    2ah+h^2 is the result
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