Question

The term of the A.P: 7, 4, 1,- 2 Is (a)3+10n (b)3-10n (c)10+3n (d)10-3n

Answer 1

Answer:

Now, put n = 1 in option, then option (C) => Sn= (10+1) + (102+3) + (103+5)...+( 10n+(2n-1)} => S = (10+ ...

Answer 2

Answer:

same answer as karan...............