Let $S=\left\{(x, y) \in \mathbb{R} \times \mathbb{R}: x \geq 0, y \geq 0, y^2 \leq 4 x, y^2 \leq 12-2…

Let $S=\left\{(x, y) \in \mathbb{R} \times \mathbb{R}: x \geq 0, y \geq 0, y^2 \leq 4 x, y^2 \leq 12-2 x\right.$ and $\left.3 y+\sqrt{8} x \leq 5 \sqrt{8}\right\}$. If the area of the region $S$ is $\alpha \sqrt{2}$, then $\alpha$ is equal to
  1. $\frac{17}{2}$
  2. $\frac{17}{3}$
  3. $\frac{17}{4}$
  4. $\frac{17}{5}$

Solution

Point of intersection of all curves is $(2,2 \sqrt{2})$ Area $=\mathrm{A}_1+\mathrm{A}_2$ $\alpha \sqrt{2}=\int_0^2 2 \sqrt{\mathrm{x}} \mathrm{dx}+\frac{1}{2} \times 3 \times 2 \sqrt{2}$ $\begin{aligned} & \alpha \sqrt{2}=2\left[\frac{x^{\frac{3}{2}}}{\frac{3}{2}}\right]_0^2+3 \sqrt{2} \\ & \alpha \sqrt{2}=\frac{17 \sqrt{2}}{3} \\ & \alpha=\frac{17}{3}\end{aligned}$

Asked in: JEE Advanced 2024 (Paper 2)

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