For a positive integer n, $\left(1+{1\over x}\right)^n$ is expanded in increasing powers of x. If three consecutive coefficients in this expansion are in the ratio, 2 : 5 : 12 , then n is equal to _______
Numerical Value Type
If you are commenting for the first time, please read the guidelines.
If you are answering for the first time, please read the guidelines.
1.1k questions
772 answers
366 comments
77 users