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sum(r=1)^(n)=(r )/(r^(4)+r^(2)+1) is equ...

`sum_(r=1)^(n)=(r )/(r^(4)+r^(2)+1)` is equal to

A

`(n^(2)+n)/(2(n^(2)+n+1))`

B

`(n^(2)+2n)/(2(n^(2)+n+1))`

C

`(2n^(2)+n)/(2(n^(2)+n+1))`

D

`(n^(2)+n)/((n^(2)+n+1))`

Text Solution

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The correct Answer is:
A
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NTA MOCK TESTS-NTA JEE MOCK TEST 59-MATHEMATICS
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