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Let S(n)=underset(k=1)overset(n)sum (n)/...

Let `S_(n)=underset(k=1)overset(n)sum (n)/(n^(2)+nk+k^(2)) and T_(n)=underset(k=0)overset(n-1)sum(n)/(n^(2)+nk+k^(2))` for `n=1, 1,2,3...,` they

A

`S_(n)lt (pi)/(3sqrt(3))`

B

`S_(n)gt (pi)/(3sqrt(3))`

C

`T_(n)lt (pi)/(3sqrt(3))`

D

`T_(n)gt (pi)/(3sqrt(3))`

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The correct Answer is:
A, D
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