Question

If the sum of n terms of a series is S=n(5n-3), then find the nth term!?​

Answer 1

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Answer....

Let Sn be total sum of n terms and Tn be n th term.

So,

Sn = S(n-1) + Tn

Tn = Sn - S(n-1)

ATQ →

Sn = n(5n - 3)

so,

S(n-1) = (n-1){5(n-1) -3}

Tn = n(5n - 3) - (n-1){5(n-1) -3}

Tn = 10n - 8

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