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MHT CET · Maths · Definite Integration

\(\int_{\frac{1}{2}}^2 \frac{1}{x} \operatorname{cosec}^{101}\left(x-\frac{1}{x}\right) \mathrm{d} x=\)

  1. A 0
  2. B 1
  3. C \(\frac{1}{4}\)
  4. D \(\frac{101}{2}\)
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Answer & Solution

Correct Answer

(A) 0

Step-by-step Solution

Detailed explanation

Let \( I = \int_{\frac{1}{2}}^2 \frac{1}{x} \operatorname{cosec}^{101}\left(x-\frac{1}{x}\right) \mathrm{d} x \) Substitute \( x = \frac{1}{t} \implies \mathrm{d} x = -\frac{1}{t^2} \mathrm{d} t \)