Question

Find the number of the term of arithmetic progression 3,15,27,39.........243

Answer 1

Step-by-step explanation:

To find out numbers

You can use formula

tn=a+(n-1)d

Where,

a= first term, n=term number,

d= common difference

Let

Find 10th term

t10 = 3+(10-1) 12

= 3+9×12

=3+108

=111