Question

Question #9e0a3

Answer 1

`864`

Explanation:

I am assuming that `2n2` means `2xxnxx2` or `4n`

All you have to do here is plug `96` into:

`S_n=2n2+5n=9n`

`S_n=9(96)=864`

Answer 2

`T_(96)=387`

Explanation:

`"assuming you mean "`

`S_n=2n^2+5n`

`•color(white)(x)T_n=S_n-S_(n-1)`

`rArrT_(96)=S_(96)-S_(95)`

`color(white)(xxxx)=2(96)^2+5(96)-(2(95)^2+5(95))`

`color(white)(xxxx)=18912-18525=387`

`rArrT_(96)=387`