Published by:
CGP EDU Academic Team
Published on: August 23, 2026
If the sum of the coefficients of 
and 
in the expansion of 
, is zero, then the value of 
is 
。
Text Solution
Verified by ExpertsThe correct answer is:
21
(21) 
for coeff. of 
coeff. of 
for coeff. of 
coeff. of 
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