Question

Write the end term of the AP 5, 9, 13, 17

Answer 1

since,

An=17

A=5

d=A2-A1

=9-5

= 4

formula:

An=A+(n-1) d

17=5+(n-1) (4)

17-5=(n-1) (4)

12=(n-1)4

n-1=3

n=3+1

n=4