Question

If Tn = 2n - 1 find Sn..​

Answer 1

⭐Solution :-

Tn = 2n - 1

Sn = ΣTn - Σ( 2n - 1 )

Sn = 2Σ - Σ1

Sn = 2(n (n+1))?2 _ n

Sn = n^2 + n _ n

Sn = n^2

Thank you ......