The arithmetic sequence has the general term . What is ?

Answer and explanation

Correct answer: B.

  1. Step 1: and .
  2. Step 2: .
Answer
.
Why not the others: : n was used instead of n - 1. : n - 2 was used instead of n - 1. : wrong formula: a multiplied by n.

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The arithmetic sequence 9; 13; 17… | South Africa Matric