Binomial Theorem 1 Question 17
18. The sum of coefficients of integral powers of in the binomial expansion is
(2015 Main)
(a)
(b)
(c)
(d)
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Answer:
Correct Answer: 18. (8)
Solution:
- Let
be the general term in the expension of
For the integral power of
Alternate Solution
We have,
On adding Eqs. (i) and (ii), we get
On putting