JEE Main 2025 Mathematics question
Suppose A and B are the coefficients of 30th and 12th terms respectively in the binomial expansion of . If 2A = 5B, then n is equal to :
Answer: (2)
Solution
A = , B = . Solving 2A=5B gives 2n-12=30, n=21.
Suppose A and B are the coefficients of 30th and 12th terms respectively in the binomial expansion of . If 2A = 5B, then n is equal to :
A = , B = . Solving 2A=5B gives 2n-12=30, n=21.