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Source: OG11th

Level: 3

P, r, s, t, u

An arithmetic sequence is a sequence in which each term after the first is equal to the sum of the preceding term and a constant. If the list of letters shown above is an arithmetic sequence, which of the following must also be an arithmetic sequence?

I 2P, 2r, 2s, 2t, 2u

II P-3, r-3, s-3, t-3, u-3

III , , , ,

  • A I only
  • B II only
  • C III only
  • D I and II
  • E IIandIII

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