SOLUTION: what is the geometric mean of 8 and 32 ? is it 16?

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Question 248480: what is the geometric mean of 8 and 32 ?
is it 16?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
Geometric mean of 8 and 32
L=a*r^(n-1)
L=32
a=8
n=3
32=8*r^(3-1)
32=8*r^2
r^2=32/8
r^2=4
r=sqrt4
r=+-2 ans.
Proof:
8,[16],32
8,[-16],32