#1**+1 **

a_1, a_2, a_3, ... can also be written as a_1, a_1 + d, a_1 + 2d... where d is the common difference of the sequence.

a_4/a_2 = (a_1 + 3d)/(a_1 + d) = 2

a_1 + 3d = 2a_1 + 2d

d = a_1

a_5/a_3 = (a_1 + 4d)/(a_1 + 2d)

= 5d/3d

= **5/3**

CubeyThePenguin Feb 2, 2022