Saved Bookmarks
| 1. |
If `S_(n) = sum_(n=1)^(n) (2n + 1)/(n^(4) + 2n^(3) + n^(2))` then `S_(10)` is less thenA. `0`B. `1`C. `2`D. `3` |
|
Answer» Correct Answer - B::C::D `S_(n)=sum_(n=1)^(n)(2n+1)/(n^(2)(n+1)^(2)) = sum_(n=1)^(n)((1)/(n^(2))-(1)/((n+1)^(2)))` `S_(10) = 1-(1)/(121)=(120)/(121)` |
|