Question

I've only touched on this topic and need a better explanation.

Answer 1

• 12, 13, 15 and 19

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The first term is given, 12.

Find the next three terms using the given formula:

• a₂ = 2(a₁) - 11 = 2(12) - 11 = 24 - 11 = 13
• a₃ = 2(a₂) - 11 = 2(13) - 11 = 26 - 11 = 15
• a₄ = 2(a₃) - 11 = 2(15) - 11 = 30 - 11 = 19

So the first 4 terms are 12, 13, 15 and 19.