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22 March, 02:07

If f (x) = 3x^2-4x-5, find (f (x+h) - f (x)) / h

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  1. 22 March, 02:23
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    3 (x^2 + 2xh + h^2) - 4 (x + h) - 5

    (3x^2 + 6xh + 3h^2 - 4x - 4h - 5 - (3x^2 - 4x - 5)) / h

    (6xh + 3h^2 - 4h) / h

    h (6x + 3h - 4) / h

    6x + 3h - 4
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