Integral \(\int\left(\frac{2 x^3-3 x+5}{2 x^2}\right) d x\) is valid for

Integral \(\int\left(\frac{2 x^3-3 x+5}{2 x^2}\right) d x\) is valid for
  1. \(x \in \mathrm{R}-\{0\}\)
  2. \(x>0\)
  3. \(x < 0\)
  4. \(x \in \mathrm{R}\)

Solution

\(\begin{aligned} I & =\int\left(\frac{2 x^3-3 x+5}{2 x^2}\right) d x \\ & =\int\left(x-\frac{3}{2 x}+\frac{5}{2 x^2}\right) d x \\ & =\frac{x^2}{2}-\frac{3}{2} \log _e x-\frac{5}{2} \frac{1}{x}+c \end{aligned}\) is valid for \(x > 0\), because \(\log _e x\) valid, if \(x > 0\) Hence, option (b) is correct.

Asked in: AP EAMCET 2020 (21 Sep Shift 2)

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