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TS EAMCET · Maths · Indefinite Integration

If \(\int e^x(1+x) \cdot \sec ^2\left(x e^x\right) d x\) \(=f(x)+\) constant, then \(f(x)\) is equal to

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

Answer & Solution

Correct Answer

(D) \(\tan \left(x e^x\right)\)

Step-by-step Solution

Detailed explanation

Given that, \[ \int e^x(1+x) \cdot \sec ^2\left(x e^x\right) d x=f(x)+\text { constant } \] Put \[ x e^x=t \text { in LHS } \]…