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AP EAMCET · Maths · Indefinite Integration

\(\int 3^x\left(f^{\prime}(x)+f(x) \log 3\right) d x\) is equal to

  1. A \(3^x f^{\prime}(x)+c\)
  2. B \(3^x \log 3+c\)
  3. C \(3^x f(x)+c\)
  4. D \(3^x+c\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(3^x f(x)+c\)

Step-by-step Solution

Detailed explanation

Let \(\left.I=\int 3^x f^{\prime}(x)+f(x) \log 3\right) d x\) \(I=\int 3^x f^{\prime}(x) d x+\int 3^x f(x) \log 3 d x\) \(\begin{aligned} & I=3^x f(x)-\int\left(3^x f(x) \log 3\right) d x+\int 3^x f(x) \log 3 d x \\ & I=3^x f(x)+c\end{aligned}\)