Question

in an ap 3, 6, 9 find the 20th term​

Answer 1

We know the formula of n thbterm is a+(n-1)d

a is the First term

d is difference between the numbers

Here a is 3 and difference is also 3

So from the equation we get 3+(20-1)3

Which is 60

Answer 2

Answer:

a =3

d= 6-3=3

an=(a+(n-1)d)

a20=3+(19)3

=57+3

=60