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Question

Question: The sum of the series \(\frac { 1 } { 3.5 }\)+ \(\frac { 1 } { 5.7 }\)+ \(\frac { 1 } { 7.9 }\)+ ….....

The sum of the series 13.5\frac { 1 } { 3.5 }+ 15.7\frac { 1 } { 5.7 }+ 17.9\frac { 1 } { 7.9 }+ ….. upto ¥ is equal to-

A

1/3

B

½

C

1/6

D

5/6

Answer

1/6

Explanation

Solution

+1(a+d)(a+2d)\frac { 1 } { ( a + d ) ( a + 2 d ) }+.... ¥ ==13.2\frac { 1 } { 3.2 }=16\frac { 1 } { 6 }