2025 SST PRELIMS P1 Q7

2025 SST PRELIMS P1 Q7

Secondary 4
4 marks

In the sequence \(17,\ x,\ y,\ z,\ 9,\ldots\), the difference between any two consecutive terms is constant.

  1. Find \(x\), \(y\), and \(z\).[2]
  2. Write down an expression for the \(n\)th term of the sequence.[1]
  3. Explain why \(-317\) is a term of this sequence.[1]

Solution:

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Answer:(a) \(x=15,\ y=13,\ z=11\) (b) \(19-2n\) (c) 168th term

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