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

यदि \(C _{ x } \equiv{ }^{25} C _{ x }\) तथा \(C _{0}+5 \cdot C _{1}+9 \cdot C _{2}+\ldots+\) (101). \(C _{25}=2^{25} \cdot k\), तो \(k\) बराबर है

  1. A \(42\)
  2. B \(45\)
  3. C \(51\)
  4. D \(48\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(51\)

Step-by-step Solution

Detailed explanation

\(\mathrm{S}=1 .^{25} \mathrm{C}_{0}+5.2^{25} \mathrm{C}_{1}+9.2^{25} \mathrm{C}_{2}+\ldots .+(101)^{25} \mathrm{C}_{25}\) \(\mathrm{S}=101^{25} \mathrm{C}_{25}+97^{25} \mathrm{C}_{1}+\ldots \ldots \ldots .+1^{25} \mathrm{C}_{25}\) \(2 \mathrm{S}=(102)\left(2^{25}\right)\)…
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