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AP EAMCET · Maths · Indefinite Integration

\(\int \frac{1}{x^2}(2 x+1)^3 d x\) is equal to

  1. A \(4 x^2+12 x+6 \log x-\frac{1}{x}+C\)
  2. B \(4 x^2+12 x-6 \log x-\frac{2}{x}+C\)
  3. C \(2 x^2+8 x+3 \log x-\frac{2}{x}+C\)
  4. D \(8 x^2+6 x+6 \log x+\frac{2}{x}+C\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(4 x^2+12 x+6 \log x-\frac{1}{x}+C\)

Step-by-step Solution

Detailed explanation

We have, \(\int \frac{1}{x^2}(2 x+1)^3 d x\) \(\begin{aligned} & =\int \frac{\left(8 x^3+1+12 x^2+6 x\right)}{x^2} d x \\ & =\int\left(8 x+12+\frac{6}{x}+\frac{1}{z^2}\right) d x\end{aligned}\)…