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

અહી  \(S=\left\{(x, y): 3 x^{2} \leq 4 y \leq 6 x+24\right\} \) નું ક્ષેત્રફળ મેળવો.

  1. A \(66\)
  2. B \(12\)
  3. C \(27\)
  4. D \(99\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(27\)

Step-by-step Solution

Detailed explanation

For \(A \,\&\, B\) \(3 x^{2}=6 x+24 \Rightarrow x^{2}-2 x-8=0\) \(\Rightarrow x=-2,4\) \(\text { Area }=\int_{-2}^{4}\left(\frac{3}{2} x+6-\frac{3}{4} x^{2}\right) \,d x\) \(=\left[\frac{3 x^{2}}{4}+6 x-\frac{x^{3}}{4}\right]_{-2}^{4}=27\)
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