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

ધારો કે વક્રો \(|y|=1-x^2\) અને \(x^2+y^2=1\) વચ્ચે ઘેરાયેલ પ્રદેશનું ક્ષેત્રફળ \(\alpha\) છે. જો \(9 \alpha=\beta \pi+\gamma ; \beta, \gamma\) પૂર્ણાંક હોય, તો \(|\beta-\gamma|\) નું મૂલ્ય શોધો.

  1. A 27
  2. B 33
  3. C 15
  4. D 18
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Answer & Solution

Correct Answer

(B) 33

Step-by-step Solution

Detailed explanation

Required area \(=\pi-4 \int_0^1\left(1-x^2\right) d x \) \( =\pi-4\left[x-\frac{x^3}{3}\right]_0^1 \) \( =\pi-4 \times \frac{2}{3}=\pi-\frac{8}{3} \) \( \therefore \alpha=\pi-\frac{8}{3} \) \( 9 \alpha=9 \pi-24 \rightarrow \beta=9, \gamma=-24 \) \( |\beta-\gamma|=|9+24|=33\)
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