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JEE Mains · Maths · STD 12 - 7.1 indefinite integral

ધારોકે \(I(x)=\int \sqrt{\frac{x+7}{x}} d x\) અને \(I(9)=12+7 \log _e 7\). જો \(I(1)=\alpha+7 \log _e(1+2 \sqrt{2})\) હોય,તો \(\alpha^4=.........\)

  1. A \(63\)
  2. B \(62\)
  3. C \(61\)
  4. D \(64\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(64\)

Step-by-step Solution

Detailed explanation

\(\int \sqrt{\frac{x+7}{x}} d x\) Put \(x = t ^2\) \(d x=2 tdt\) \(\int 2 \sqrt{ t ^2+7} d t=2 \int \sqrt{ t ^2+\sqrt{7}^2} d t\) \(I ( t )=2\left[\frac{ t }{2} \sqrt{ t ^2+7}+\frac{7}{2} \ln \left| t +\sqrt{ t ^2+7}\right|\right]+ C\)…
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