Question

Given a=5,d=3,an=50, find n and sn​

Answer 1

Step-by-step explanation:

here, a=5,d=3,an=50

n=?,Sn=?

an=a+(n-1)d

50=5+(n-1)3

50-5=(n-1)3

45/3=n-1

15+1=n

n=16

Sn=n/2(a+an)

Sn=16/2(5+50)

Sn=8×55

Sn=440.

Answer 2

n=16 & Sn=440

Please follow me ..........

Please mark me a brainlist..........