OCR C2 2005 June — Question 1

Exam BoardOCR
ModuleC2 (Core Mathematics 2)
Year2005
SessionJune
TopicArithmetic Sequences and Series

1 A sequence \(S\) has terms \(u _ { 1 } , u _ { 2 } , u _ { 3 } , \ldots\) defined by $$u _ { n } = 3 n - 1 ,$$ for \(n \geqslant 1\).
  1. Write down the values of \(u _ { 1 } , u _ { 2 }\) and \(u _ { 3 }\), and state what type of sequence \(S\) is.
  2. Evaluate \(\sum _ { n = 1 } ^ { 100 } u _ { n }\).