MHT-CET Full Test-9 Mathematics Que-40 Solution

Question-40 \int_{-2}^0\left(x^3+3x^2+3x+3+(x+1)\cos(x+1)\right)\,dx is equal to

A) 6

B) 4

C) -4

D) 0

Answer: B) 4

Explanation

Let I=\int_{-2}^{0}\left[(x+1)^{3}+2+(x+1) \cos (x+1)\right] d x

Let \boldsymbol{x}+\mathbf{1}=\boldsymbol{y}

I=\int_{-1}^{1}\left(y^{3}+y \cos y+2\right) d y=2 \int_{0}^{1} 2 d y

By even-odd property of definite integral

Hence, I=4

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