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JEE Mains · Maths · STD 12 - 8. Application and integration

પ્રદેશ \(\left\{(x, y): x^2 \leq y \leq 8-x^2, y \leq 7\right\}\)નું ક્ષેત્રફળ \(..........\) છે. 

  1. A \(21\)
  2. B \(18\)
  3. C \(24\)
  4. D \(20\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(20\)

Step-by-step Solution

Detailed explanation

\(y \geq x^2 \quad y \leq 8-x^2 \quad y \leq 7\) \(x^2=8-x^2\) \(x^2=4\) \(x= \pm 2\) \(2\left(1.7+\int \limits_1^2\left(8-2 x^2\right) d x\right)-2 \int \limits_0^1\left(x^2\right) d x\) \(=2\left[7+\left(8 x-\frac{2 x^3}{3}\right)_1^2\right]-2\left(\frac{x^3}{3}\right)_0^1\)…
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