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

પ્રદેશ \(R =\left\{( x , y ): 5 x ^{2} \leq y \leq 2 x ^{2}+9\right\}\) નું ક્ષેત્રફળ .....ચો. એકમ છે.

  1. A \(11 \sqrt{3}\)
  2. B \(12 \sqrt{3}\)
  3. C \(9 \sqrt{3}\)
  4. D \(6 \sqrt{3}\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(12 \sqrt{3}\)

Step-by-step Solution

Detailed explanation

Required area \(=2 \int_{0}^{\sqrt{3}}\left(2 x ^{2}+9-5 x ^{2}\right) dx\) \(=2\left[9 x - x ^{3}\right]_{0}^{\sqrt{3}}\) \(=2[9 \sqrt{3}-3 \sqrt{3}]=12 \sqrt{3}\)
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