Question

if the difference of an AP is 2, then find a5-a3.(not only answer, i need full step by step)​

Answer 1

Step-by-step explanation:

a

3

=a+2d

⟹2=a+2d

⟹a=2−2d

a

2

=a+d=2−2d+d=2−d

a

4

=a+3d=2−2d+3d=2+d

a

5

=a+4d=2−2d+4d=2+2d

∑

i=1

5

a

i

=a

1

+a

2

+a

3

+a

4

+a

5

=2−2d+2−d+2+d+2+2d

=10