Published by:
CGP EDU Academic Team
Published on: August 14, 2026
If the coefficient of x 7 in 
and the coefficient of x -5 in 
are equal, then a 4 b 4 is equal to:
Text Solution
Verified by ExpertsThe correct answer is:
C
Given,
The coefficient of 
in the expansion of 
is equal to the coefficient of 
in 
. We know that, the general term 
in the expansion 
is
Applying to 
, we get
Therefore, 
for coefficient of 
.
Thus,
Similarly, applying to 
, we get
Therefore, 
for coefficient of 
So,
Hence, applying the given condition we get
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