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JEE Mains · Maths · STD 11 - 7. binomial theoram

यदि \(\left( x +\sqrt{ x ^{2}-1}\right)^{6}+\left( x -\sqrt{ x ^{2}-1}\right)^{6}\) के प्रसार में \(x ^{4}\) तथा \(x ^{2}\) के गुणांक क्रमशः \(\alpha\) तथा \(\beta\) हैं, तो 

  1. A \(\alpha+\beta=60\)
  2. B \(\alpha+\beta=30\)
  3. C \(\alpha-\beta=-132\)
  4. D \(\alpha-\beta=60\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(\alpha-\beta=-132\)

Step-by-step Solution

Detailed explanation

\(2\left[^{6} \mathrm{C}_{0} \mathrm{x}^{6}+^{6} \mathrm{C}_{2} \mathrm{x}^{4}\left(\mathrm{x}^{2}-1\right)+6 \mathrm{C}_{4} \mathrm{x}^{2}\left(\mathrm{x}^{2}-1\right)^{2}+^{6} \mathrm{C}_{6}\left(\mathrm{x}^{2}-1\right)^{3}\right]\) \(\alpha=-96 \;and\; \beta=36\)…
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