Binomial Theorem 1 Question 25
27. If the coefficients of and in the expansion of in powers of are both zero, then is equal to
(a)
(b)
(c)
(d)
Fill in the Blanks
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Solution:
- To find the coefficient of
and , use the formula of coefficient of in is and then simplify.
In expansion of
Coefficient of
Given, coefficient of
Similarly, coefficient of
On solving Eqs. (i) and (ii), we get