Question

if Sn the sum of nth terms is Sn=2n square+ n find nth term of AP

Answer 1

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Answer 2

$sn = 2n {}^{2} \\ let \: n \: be \: 1 \\ \\ {2n}^{2} = 2 \times 1 { }^{2} \\ 2n { }^{2} = 2 \times 1 \\ \\ sn = 2$

let n =2

Sn=2n²

Sn=2×2²

Sn=2×4

Sn=8