Posted by Terri on Monday, February 23, 2009 at 5:36pm.
Find the geometric mean between 7 and 21
I do not have a clue where to start the equation given was
extreme/extreme=mean/extreme
so (mean)(mean)=(extreme)(extreme)
help please

geometry  Reiny, Monday, February 23, 2009 at 5:57pm
let the geometric mean be x
then x/7 = 21/x
x^2 = 147
x = ± √147