Answer:
The correct option is 6
Explanation:
Given expression,
By the binomial expansion,
Where,
Thus,
For finding the term containing
9 - r = 3
⇒ 9 - 3 = r
⇒ r = 6
i.e. the required term is,
Hence, the power of n in that term = 6.
6.0m questions
7.9m answers