Hey guys, (and girls), I'm new here and I was wondering if someone could get me started on this problem:
Find y so that (4y+1)+(y+4)+(10-y) form a geometric series.
So far, I know the following:
T1=4y+1
T2=y+4
T3=10-y
Tn=ar^(n-1)
Thx in advance!
EDIT: I also know that I need to find 2 anwsers for r.