Posted by Mark on .
A sequence has t(sub1) = 5 and t(sub2) = 15
a. if the sequence is geometric, what is the common ratio? What do t(sub3) and t(sub4) equal?
b. if the sequence is arithmetic, what is the common ratio? What do t(sub3) and t(sub4) equal?

math 
Steve,
a. r=3, so you have 5,15,45,135,...
b. d=10, do 5,15,25,35,...