M math951 Jul 2015 564 14 United States Dec 13, 2015 #1 2nd term=3 4th term=1/3 6th term= unknown, find. 3=ar 1/3=ar^3 Then that equals 9=r^2 r=3 6th term= ar^n-1 6th term=a(3)^5 6th term=a243 Where did I mess up at ?

2nd term=3 4th term=1/3 6th term= unknown, find. 3=ar 1/3=ar^3 Then that equals 9=r^2 r=3 6th term= ar^n-1 6th term=a(3)^5 6th term=a243 Where did I mess up at ?

skeeter MHF Helper Jun 2008 16,216 6,764 North Texas Dec 13, 2015 #2 $r^2=\dfrac{1}{9}$ Reactions: 1 person