Question

-20, +20, -20, +20
is the given sequence of an Arithmetic Progression?​

Answer 1

Answer:

Given set is not an A. P.

Step-by-step explanation:

a1=-20

a2=20

a3=-20

a4=20

d=a2-a1

=20-(-20)

=20+20

=40

d=a3-a2

= -20+20

= 0

as a1-a2 is not equal to a3-a2

therefore, given set is not an A. P.