(5,6) (8,2)
what is endpoints given

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?