It's late and my brain isn't in tip top shape - how to answer this question? (1 Viewer)

[Shadowdude]

This one:

 

[jet]

 

[Shadowdude]

Thanks! So basically just equate the two.

 

[Aquawhite]

Well the definitition of an arithmetic progression is defined as there being a common difference between the two. i.e. second - first term = common difference.

Since the diferences are the same - tadah!