Question

if d=5,5a=75,then find a and an

Answer 1

a1 =75

d = 5

a2 = 80

a3 =85

an = 75+(n-1)5

an = 75 + n - 5

an = 70 +n

hope that helps !!!

Answer 2

5a = 75
a= 75/5
=15

a=15
an =15×n
=15n