The area (in square units) in the first quadrant bounded by the curve $y=x^2+2$ and the lines $y=x+1, x=0$…

The area (in square units) in the first quadrant bounded by the curve $y=x^2+2$ and the lines $y=x+1, x=0$ and $x=3$, is
  1. $\frac{15}{4}$
  2. $\frac{21}{2}$
  3. $\frac{17}{4}$
  4. $\frac{15}{2}$

Solution


$\begin{aligned} \text { Required area } & =\int_0^3\left(x^2+2\right)-(x+1) \mathrm{d} x \\ & =\int_0^3\left(x^2-x+1\right) \mathrm{d} x \\ & =\left[\frac{x^3}{3}-\frac{x^2}{2}+x\right]_0^3=\frac{15}{2} \text { sq. units }\end{aligned}$

Asked in: MHT CET 2024 (04 May Shift 2)

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