2 A sequence \(S\) has terms \(u _ { 1 } , u _ { 2 } , u _ { 3 } , \ldots\) defined by \(u _ { n } = 3 n + 2\) for \(n \geqslant 1\).
- Write down the values of \(u _ { 1 } , u _ { 2 }\) and \(u _ { 3 }\).
- State what type of sequence \(S\) is.
- Find \(\sum _ { n = 101 } ^ { 200 } u _ { n }\).