Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The sum of series 
+ 
+ 
+….. is -
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
We know that
e = 1 + 
+ 
+ 
+ 
+…. ∞ …(i)
e –1 = 1 – 
+ 
– 
+ 
–…. ∞ …(ii)
On adding Equation (i) and (ii), we get
e + e –1 = 2 + 
+ 
+…. ∞
– 2 = 
+ 
+…. ∞
= 2 
= 
+ 
+…. ∞ .
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