Question

in an AP given a=5, d=3, an=50 find n and sn​

Answer 1

Step-by-step explanation:

in an AP given a=5, d=3, an=50 find n and sn

Answer 2

Answer:

1. Tn =a+(n-1)d.So 50= 5+(n-1)3.Therefore n=16 and Sn=a+l/2 .So 5+50=55.then sn =55/2