Question -
Answer -
Given:
(x2 +1/x)12
If x-1 occursat the (r + 1)th term in the given expression.
Then, we have:
Tr+1 = nCr xn-r ar
For this term tocontain x-1, we must have
24 – 3r = -1
3r = 24 + 1
3r = 25
r = 25/3
It is not possible,since r is not an integer.
Hence, there is noterm with x-1 in the given expansion.