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AssignmentMultiple Choice

Derivatives of Functions

Question 1 • AP Calculus AB - MA5186 A

Which is the derivative of f(x) = 9x2 + x?

Answer
A
f ′(x) = 18x
B
f ′(x) = 18x2 + 1
C
f ′(x) = 9x + 1
D
f ′(x) = 18x + 1

Explanation

Differentiate each term using the power rule: the derivative of 9x² is 18x, and the derivative of x is 1. Therefore, f′(x) = 18x + 1, which is choice D.

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