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JEE Mains · Maths · STD 11 - 8. sequence and series

\(\left(2 .{ }^{1} P _{0}-3 .{ }^{2} P _{1}+4 .{ }^{3} P _{2}-\ldots .\right.\) \(51\) પદ સુધી \()\)+\(\left(1 !-2 !+3 !-\ldots . .\right.\)\(51^{\text {th }}\) પદ સુધી \()\) ની કિમત શોધો 

  1. A \(1+(51) !\)
  2. B \(1-51(51) !\)
  3. C \(1+(52) !\)
  4. D \(1\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(1+(52) !\)

Step-by-step Solution

Detailed explanation

\(S =\left(2 \cdot{ }^{1} P _{0}-3 .{ }^{2} p _{1}+4 .{ }^{3} p _{2} \ldots \ldots \ldots\right.\) upto 51 terms \()\) \(+(1 !+2 !+3 ! \ldots \ldots \ldots .\) upto 51 terms \()\) \(\left[\because{ }^{n} p_{n-1}=n !\right]\) \( \therefore \quad S =\)…
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