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

જો \((1+x)^{\mathrm{p}}(1-x)^{\mathrm{q}}\) ના વિસ્તરણમાં, \(x\) અને \(x^2\) ના સહગુણકો અનુક્રમે 1 અને -2 હોય, તો \(\mathrm{p}^2+\mathrm{q}^2\) = __________

  1. A 18
  2. B 13
  3. C 8
  4. D 20
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Answer & Solution

Correct Answer

(B) 13

Step-by-step Solution

Detailed explanation

(1+\mathrm{x})^{\mathrm{p}}(1-\mathrm{x})^{\mathrm{q}}=\left({ }^{\mathrm{p}} \mathrm{C}_0+{ }^{\mathrm{p}} \mathrm{C}_1 \mathrm{x}+{ }^{\mathrm{p}} \mathrm{C}_2 \mathrm{x}^2+\ldots\right)\left({ }^{\mathrm{q}} \mathrm{C}_0-{ }^{\mathrm{q}} \mathrm{C}_1 \mathrm{x}+{…

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