2025 GESS PRELIMS P1 Q9

2025 GESS PRELIMS P1 Q9

Secondary 4
3 marks

The sum of the first \(n\) terms of a sequence is \(n(3n-2)\).

  1. Find the first 3 terms of the sequence.[2]
  2. Find, in terms of \(n\), an expression for the \(n\)th term of this sequence.[1]

Solution:

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Answer:(a) \(1,7,13\) (b) \(6n-5\)

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