Question

Que of the Sum of the first n term of an A.P
(A) Sn= n (a+nd) |( B) sn=n/2(2a+(n-1)d)
(c) sn=n/2 (2a+(-1)d) (d) sn(2a+(n))​

Answer 1

Answer:

A

Step-by-step explanation:

the formula of arithmetic progression

sn=n(a+nd)

so the ans will be A

Answer 2

Answer:

Here answer is option (A)