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AP EAMCET · Maths · Indefinite Integration

\(\int e^x \frac{x^2+1}{(x+1)^2} d x\) is equal to

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

Answer & Solution

Correct Answer

(C) \(e^x\left(\frac{x-1}{x+1}\right)+C\)

Step-by-step Solution

Detailed explanation

\(\begin{aligned} & \text { Let } I=\int e^x \frac{x^2+1}{(x+1)^2} d x=\int e^x\left(\frac{x^2-1+2}{(x+1)^2}\right) d x \\ & =\int e^x\left(\frac{x^2-1}{(x+1)^2}+\frac{2}{(x+1)^2}\right) d x \\ & =\int e^x\left(\frac{x-1}{x+1}+\frac{2}{(x+1)^2}\right) d x\end{aligned}\) Put…