$\int_{0}^{4}|x-2| d x=$

$\int_{0}^{4}|x-2| d x=$
  1. 0
  2. 4
  3. 8
  4. 2

Solution

$\begin{aligned} \int_{0}^{4}|x-2| d x &=\int_{0}^{2}(2-x) d x+\int_{2}^{4}(x-2) d x \\ &=2[x]_{0}^{2}-\frac{1}{2}\left[x^{2}\right]_{0}^{2}+\frac{1}{2}\left[x^{2}\right]_{2}^{4}-2[x]_{2}^{4} \\ &=2(2)-\frac{1}{2}(4)+\frac{1}{2}(16-4)-2(4-2) \\ &=4-2+6-4=4 \end{aligned}$

Asked in: MHT CET 2020 (20 Oct Shift 2)

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