Progression (Sequence and Series)Hard
Question
Sum of the first n terms of the series 
+ ..... is equal to
+ ..... is equal toOptions
A.2n - n - 1
B.1 - 2- n
C.n + 2- n - 1
D.2n + 1
Solution
Sum of the n terms of the series + ..... upto n terms can be written as
.... upto n terms
= n -
= n -
+ ..... upto n terms can be written as .... upto n terms = n -
= n -
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