If the 17 th and 18 th terms in the expansion of (2 + a) 50 are equal, find the value of a.

Question

Philoid · Accepted Answer

Given :

To Find : value of a

For (2 + a)⁵⁰

A=2, b=a and n=50

We have,

For the 17^th term, r=16

For the 18^th term, r=17

As 17^th and 18^th terms are equal

……..

• a = 1122

Conclusion : value of a = 1122