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AP EAMCET · Maths · Indefinite Integration

\(\int e^x\left(\frac{x+2}{x+4}\right)^2 d x=\)

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

Answer & Solution

Correct Answer

(C) \(\frac{x e^x}{(x+4)}+c\)

Step-by-step Solution

Detailed explanation

\(\begin{aligned} & \text { } \mathrm{I}=\int\left(\frac{x+2}{x+4}\right)^2 e^x d x=\int e^x\left[\frac{x^2+4+4 x}{(x+4)^2}\right] d x \\ & \Rightarrow \mathrm{I}=\int \frac{e^x x}{(x+4)} d x+\int \frac{4 e^x}{(x+4)^2} d x \end{aligned}\) Integrating by parts…