Published by:
CGP EDU Academic Team
Published on: August 13, 2026
If a and d are two complex numbers, then the sum to 
terms of the following series
is
A
B
C
0
D
None of these
Text Solution
Verified by ExpertsThe correct answer is:
C
We can write
upto 
terms
....(i)
Again, 
...(ii)
Differentiating with respect to x ,
....(iii)
Putting x =1 in (ii) and (iii), we get
and 
Thus the required sum to ( n +1) terms, by (i)
= a .0 + d.0 = 0.
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