Given two terms in a geometric sequence find the term named: a5= -324 and a2=12 Find a 9
-(324 / 12)^1/3 = - 3 This is the common ratio.
12 / -3 = -4 This is the first term.
The sequence looks like this from 1st term to 9th term
-4, 12, -36, 108, -324, 972, -2916, 8748, -26244
9th term =-26244
