Question

21.
For an A.P. if the first term is 8 and the common
difference is 8, then Sn
(A) 2n(n-1)
(B) 4n(n-1)
(C) 2n(n+1) (D) 4n(n + 1)​

Answer 1

Answer:

4n(n+3)

Step-by-step explanation:

this is my ans and all option which is u given are incorrect