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01-04-2020
Mathematics

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Please Help! It is Pre-Calc and I need to know the answer!

Please Help It is PreCalc and I need to know the answer class=

Respuesta :

01-04-2020

That's again the derivative at 2, so the answer is A. 4. Hard way:

f(x)=x²

f(2)=4

f(2+h) = (2+h)² = 4 + 4h + h²

f(2+h) - f(2) = 4h + h²

(f(2+h)-f(2))/h = 4 + h

Limit is 4.

Answer: A. 4

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