Question

Find the middle term of an A.P . 20, 16, 12 ........, -180

Answer 1

Answer:

a1-a2

b1-b2 use this formula or concept

Answer 2

Step-by-step explanation:

use a2-a1

d=16-20=-4

t4=12-4=8

t5=8-4=4

.......

.

till-180