college algebra

f(x)= 4x+3 what is f(x+h) - f(x) divided by h

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  1. just plug in the values:

    f(x) = 4x+3
    f(x+h) = 4(x+h)+3

    f(x+h)-f(x) = (4x+4h+3) - (4x+3) = 4h

    (f(x+h) - f(x))/h = 4h/h = 4

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  2. 4x-1 / 2x^2+3

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