Homework Help: math

Posted by Mark on Saturday, April 28, 2012 at 11:16pm.

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, Sunday, April 29, 2012 at 10:38am
a. r=3, so you have 5,15,45,135,...
b. d=10, do 5,15,25,35,...

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