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JEE Mains · Maths · STD 12 - 7.2 definite integral

यदि \(I _{ m , n }=\int \limits_{0}^{1} x ^{ m -1}(1- x )^{ n -1} dx , m , n \geq 1\) तथा \(\int \limits_{0}^{1} \frac{ x ^{ m -1}+ x ^{ n -1}}{(1+ x )^{ m + n }} dx =\alpha I _{ m , n }, \alpha \in R\), है, तो \(\alpha\) बराबर है

  1. A \(3\)
  2. B \(4\)
  3. C \(1\)
  4. D \(2\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(1\)

Step-by-step Solution

Detailed explanation

\(I_{m, n}=\int_{0}^{1} x^{m-1}(1-x)^{n-1} d x=I_{n, m}\) Now Let \(x=\frac{1}{y+1} \Rightarrow d x=-\frac{1}{(y+1)^{2}} d y\) So…
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