What does this mean ??

QUESTION POSTED AT 02/06/2020 - 01:31 AM

Answered by admin AT 02/06/2020 - 01:31 AM

Conjecture:a₁ = 1.2
a₂ = 2.3
a₃ = 3.4
a₄ = 4.5
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a(n) = n.(n+1)
a₁₅ =15(15+1)
a₁₅ = 15.16 (answer)
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