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

\((1+x)^{20}\) के प्रसार में मध्य पद का गुणांक तथा \((1+ x )^{19}\) के प्रसार में दो मध्य पदों के गुणांकों के योग का अनुपात है ........ |

  1. A \(5\)
  2. B \(4\)
  3. C \(1\)
  4. D \(11\)
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Answer & Solution

Correct Answer

(C) \(1\)

Step-by-step Solution

Detailed explanation

Coeff. of middle term in \((1+x)^{20}={ }^{20} C_{10}\) Sum of Coeff. of two middle terms in \((1+x)^{19}={ }^{19} C_{9}+{ }^{19} C_{10}\) So required ratio…
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