Question

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

Answer 1

a=5
d=3
an=50
n=?
we have to find n
an=a+(n-1)d
50=5+(n-1)3
=>50-5=(n-1)3
=>45/3=n-1
=>15=n-1
=>15+1=n
16=n

Answer 2

hi mate
here is ur answer
an=a+(n+1)d
50=5+(n-1)3
50=5+3n-3
50=2+3n
48/3=n
n=16

SN=n/2(a+an)
=16/2(5+50)
=8(55)
= 440

I hope this will help you

✔️✔️✔️✔️mark as brainliest.....✔️✔️✔️