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Find the derivative of f(x) = 5x + 9 at x = 2
Help plz.

1 Answer

3 votes
The derivative of f(x) = 5x + 9 is f'(x) = 5.

This is, it is a constant: it does not depends on x.

Then, the derivative at x = 2 (and at any value of x) is 5.

Answer: 5


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