14. What is the derivative of f(x) = 4x(x2 + 1)3 ?
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A.4(x2 + 1)2(x2 + 3x + 1) |
B. 4(x2 + 1)2(7x2 + 1) |
C. 8x2(x2 + 1)3 |
|
D. 12x(x2 + 1)2 |
E. 24x2(x2 + 1)2 |
Solution: The answer is B
Use the Product Rule and the Chain Rule to differentiate as follows:
