Binomial Theorem 1 Question 11
12. The positive value of for which the coefficient of in the expression is 720 , is
(a) 3
(b)
(c)
(d) 4
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Answer:
Correct Answer: 12. (a)
Solution:
- The general term in the expansion of binomial expression
is , so the general term in the expansion of binomial expression is
Now, for the coefficient of
So, the coefficient of