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TS EAMCET · Maths · Indefinite Integration

\(\int \frac{d x}{x\left(x^4+1\right)}=\)

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

Answer & Solution

Correct Answer

(B) \(\frac{1}{4} \log \left(\frac{x^4}{x^4+1}\right)+C\)

Step-by-step Solution

Detailed explanation

\text { } \begin{aligned} \int \frac{d x}{x\left(x^4+1\right)} & =\int \frac{x^4+1-x^4}{x\left(x^4+1\right)} d x \\ & =\int \frac{x^4+1}{x\left(x^4+1\right)} d x-\int \frac{x^4}{x\left(x^4+1\right)} d x \\ & =\int \frac{1}{x} d x-\int \frac{x^3}{x^4+1} d x \\ & =\log |x|-\int…