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Find the derivative of f(x) = 12x2 + 8x at x = 9.
256
-243
288
224
I answer questions for you but no one ever answers my questions. You're all are so ungrateful. I've been trying to find the answer for several hours and nothing. Yes I did try to teach myself but I just cant understand it.

Respuesta :

Answer:

It's 224.

Step-by-step explanation:

We use the power rule for a derivative.

If f(x) = ax^n then the derivative  f'(x) = anx^(n-1).

So the derivative of 12x^2 + 8x

= 2*12 x^(2-1) + 8x^(1-1)

= 24x + 8x^0

= 24x + 8.

When x = 9 the derivative = 24(9) + 8

=  224.

224 is the answer to you question... hope this helps

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