Question

find the 20th term of the AP : 28,24, 20....

Answer 1

Answer:

a=28

d=24-28=-4

a20=a+19d

=28+19(-4)

=28-76

= -48

Answer 2

Answer:

Here , a = 28

b = -4

Step-by-step explanation:

Now , we know that

a20 = a + 19d

a20 = 28 + 19×(-4)

a20 = 28 + (-76)

a20 = 28 - 76

a20 = -48