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AP EAMCET · Maths · Indefinite Integration

If \(\int e^x\left(\frac{x+2}{x+4}\right)^2 d x=f(x)+\) arbitrary constant, then \(f(x)=\)

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

Answer & Solution

Correct Answer

(A) \(\frac{x e^x}{x+4}\)

Step-by-step Solution

Detailed explanation

Given, \(\int e^x\left(\frac{x+2}{x+4}\right)^2 d x=f(x)+\mathcal{c}\) Now, \[ \begin{aligned} & \int e^x\left(\frac{x+2}{x+4}\right)^2 d x=\int e^x\left(\frac{x^2+4+4 x}{(x+4)^2}\right) d x \\ & =\int e^x\left(\frac{x}{x+4}+\frac{4}{(x+4)^2}\right) d x \end{aligned} \]…