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14 January, 13:00

Find the derivative of f at x. that is, find f ' (x). f (x) = 7x + 8; x = 5

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Answers (2)
  1. 14 January, 14:32
    0
    We know that f (x) = 7x + 8. So, take the derivative of this function with respect to x.

    This gives

    f' (x) = 7

    Now, you probably realized that the x value disappeared. This means that no matter what value of x you use, the derivative of this function is always going to be 7, even at x = 5. That is, the rate of change of this function is always going to be a rate of 7.
  2. 14 January, 15:50
    0
    F (7) is the final answer
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