AP EAMCET · Maths · Binomial Theorem
The least value of so that
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
Given: C3n-1+C4n-1>C3n ⇒C4-1n-1+C4n-1>C3n ⇒C4n>C3n ∵Cr-1n+Crn=Crn+1 ⇒n!4!×n-4!>n!3!×n-3! ⇒3!×n-3!>4!×n-4! ⇒3!×n-3×n-4!>4×3!×n-4! ⇒n-3>4 ⇒n>7 So, least value of…
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