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TS EAMCET · Maths · Indefinite Integration

\(\int \frac{x+1}{x\left(1+x e^x\right)} d x=\)

  1. A \(\log \left|\frac{1+x e^x}{x+1}\right|+C\)
  2. B \(\log \left|\frac{x e^x}{1+x e^x}\right|+C\)
  3. C \(\log \left|\frac{(x+1) e^x}{1+e^x}\right|+C\)
  4. D \(\log \left|\frac{x e^x}{x+e^x}\right|+C\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(\log \left|\frac{x e^x}{1+x e^x}\right|+C\)

Step-by-step Solution

Detailed explanation

Let \[ I=\int \frac{x+1}{x\left(1+x e^x\right)} d x \] \(\operatorname{Put}\left(1+x e^x\right)=t \Rightarrow(x+1) e^x d x=d t\)…