Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The sum of first 
terms of the given series 
is 
, when 
is even. When 
is odd, the sum will be
A
B
C
D
None of these
Text Solution
Verified by ExpertsThe correct answer is:
B
When 
is odd, the last term. 
the 
term will be 
in this case 
is even and so the sum of the firs
terms of the series is obtained by replacing 
by 
in the given formula and so is 
.
Hence the sum of the n terms
= (the sum of 
terms) + the 
term
.
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