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AP EAMCET · Maths · Indefinite Integration

\(\int \frac{d x}{(1+\sqrt{x}) \sqrt{x-x^2}}=\)

  1. A \(-2 \sqrt{\frac{1+\sqrt{x}}{1-\sqrt{x}}}+c\)
  2. B \(-\sqrt{\frac{1-\sqrt{x}}{1+\sqrt{x}}}+c\)
  3. C \(-2 \sqrt{\frac{1-\sqrt{x}}{1+\sqrt{x}}}+c\)
  4. D \(2 \sqrt{\frac{1+\sqrt{x}}{1-\sqrt{x}}}+c\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(-2 \sqrt{\frac{1-\sqrt{x}}{1+\sqrt{x}}}+c\)

Step-by-step Solution

Detailed explanation

Let \(u=\sqrt{x}\) \(\implies\) \(dx=2u\,du\). \(\int \frac{2u\,du}{(1+u)\sqrt{u^2-u^4}} = \int \frac{2u\,du}{(1+u)u\sqrt{1-u^2}} = \int \frac{2\,du}{(1+u)\sqrt{1-u^2}}\) Let \(u=\sin \theta\) \(\implies\) \(du=\cos \theta\,d\theta\).…