Correct Answer: Option B

Explanation

Integrate y = 4x\(^3\) + 2x + cos x.

∫4x\(^3\) dx = x\(^4\) + ∫2x dx = x\(^2\) + ∫cos x dx = sin x

The integral is x\(^4\) + x\(^2\) + sin x + C

There is an explanation video available below.

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