Question

For the sumof the first n terms of an A. P. Sn
=

O n/2[11+ tn)
O n/2'[a + (n - 1)d)
0 n/3[2 + (m - 1)d]
Oa/2 [1 + (n − 1)d]​

Answer 1

Answer:

tfjkgvgujnvg98uiutgjugxft6hvd56gff

Answer 2

Answer:

Sn= n/ 2 [ 2a + (n- 1) d]

I hope it will help you