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

જો \(1 + {x^4} + {x^5} = \sum\limits_{i = 0}^5 {{a_i}\,(1 + {x})^i,} \) બધા \(x\,\in\) \(R\) માં આવેલ છે  તો \(a_2\) ની કિમત મેળવો. 

  1. A \(-4\)
  2. B \(6\)
  3. C \(-8\)
  4. D \(10\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(-4\)

Step-by-step Solution

Detailed explanation

\(1 + {x^4} + {x^5} = \sum\limits_{i = 0}^5 {{a_i}} {(1 + x)^i}\) \( = {a_0} + {a_1}{(1 + x)^1} + {a_2}{(1 + x)^2} + {a_3}{(1 + x)^\beta }\) \( + {a_4}{(1 + x)^4} + {a_5}{(1 + x)^5}\) \( \Rightarrow 1 + {x^4} + {x^5}\)…
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