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JEE Mains · Maths · STD 12 - 7.2 definite integral

यदि \(\int \limits_0^{\sqrt{3}} \frac{15 x^3}{\sqrt{1+x^2+\sqrt{\left(1+x^2\right)^3}}} d x=\alpha \sqrt{2}+\beta \sqrt{3}\) है, जहाँ \(\alpha, \beta\) पूर्णाक है, तो \(\alpha+\beta\) बराबर है \(............\)

  1. A \(10\)
  2. B \(11\)
  3. C \(12\)
  4. D \(13\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(10\)

Step-by-step Solution

Detailed explanation

Put \(1+ x ^{2}= t ^{2}\) \(2 x dx =2 t dt\) \(X dx = t d t\) \(\therefore \int_{1}^{2} \frac{15\left( t ^{2}-1\right) t dt }{\sqrt{ t ^{2}+ t ^{3}}}\) \(15 \int_{1}^{2} \frac{ t \left( t ^{2}-1\right)}{ t \sqrt{1+ t }} dt\) Put \(1+ t = u ^{2}\) \(dt =2 u du\)…
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