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3-118.

Multiple Choice: If $f^\prime(x) = 6x^2 − 4$ , then which of the following could be $f(x)$ ?

$f(x) = 2x^3 − 4x + l$

$f(x) = 2x^3 − 4x − 4$

$f(x) = 2x^3 − 4x + 4$

$f(x) = 2x(x^2 − 2)$

All of these

Hint:

Work backwards. Find the derivative of each distractor.

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