The area bounded by the curves $y=(x-1)^2$, $y=(x+1)^2$ and $y=\frac{1}{4}$ is

The area bounded by the curves $y=(x-1)^2$, $y=(x+1)^2$ and $y=\frac{1}{4}$ is
  1. $\frac{1}{3}$ sq. units.
  2. $\frac{2}{3}$ sq. units.
  3. $\frac{1}{4}$ sq. units.
  4. $\frac{1}{5}$ sq. units.

Solution

$\begin{aligned} \text { Required area } & =2 \int_0^{\frac{1}{2}}\left[(x-1)^2-\frac{1}{4}\right] \mathrm{d} x \\ & =2\left[\frac{(x-1)^3}{3}\right]_0^{\frac{1}{2}}-\frac{1}{2}[x]_0^{\frac{1}{2}} \\ & =\frac{2}{3}\left(-\frac{1}{8}+1\right)-\frac{1}{2}\left(\frac{1}{2}-0\right) \\ & =\frac{1}{3} \text { sq. units }\end{aligned}$

Asked in: MHT CET 2023 (14 May Shift 1)

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