Question

Whic term of the AP:3,8,13,18........,is 78

Answer 1

let An be 78 so,
an=a+(n-1)d
78=3+(n-1)×5
(78-3)/5=n-1
75/5=n-1
15+1=n
so n=16

hope this helps u :)

Answer 2

this is the right answer bro