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JEE Mains · Maths · STD 12 - 7.2 definite integral

यदि \(\int_0^1 \frac{1}{\left(5+2 x-2 x^2\right)\left(1+e^{(2-4 x)}\right)} d x=\frac{1}{\alpha} \log _e\left(\frac{\alpha+1}{\beta}\right) \text {, }\) \(\alpha, \beta>0\) है, तो \(\alpha^4-\beta^4\) बराबर है :

  1. A \(21\)
  2. B \(0\)
  3. C \(19\)
  4. D \(-21\)
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Answer & Solution

Correct Answer

(A) \(21\)

Step-by-step Solution

Detailed explanation

\(I=\int \limits_0^1 \frac{d x}{\left(5+2 x-2 x^2\right)\left(1+ e ^{2-4 \pi}\right)}\) \(x \rightarrow 1-x\) \(I=\int \limits_0^1 \frac{e^{2-4 x} d x}{\left(5+2 x-2 x^2\right)\left(1+ e ^{2-4 x}\right)}\) Add \((i)\) and \((ii)\)…
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