2007-05-20 14:25:47 · 4 answers · asked by jarnagin.m@sbcglobal.net 1 in Science & Mathematics ➔ Mathematics
20/x = x/45
x=sqrt(20*24)
Geometric mean = sqrt(20*45)=30
You could be pedantic if you want and say it is ±30.
2007-05-20 14:30:13 · answer #1 · answered by gudspeling 7 · 0⤊ 0⤋
Let x be the geometric mean between 20 and 45
Then x/20=45/x
or,x^2=900 [by cross multiplication]
x=30
Therefore 30 is the geometric mean bet.20 and 45
2007-05-20 14:37:32 · answer #2 · answered by alpha 7 · 0⤊ 0⤋
This is an easy way of remembering how to calculate the geometric mean.
What is the geometric mean of numbers x and y?
geometeric mean = √(xy)
So in your case
geometeric mean = √(20*45) = 30
.
2007-05-20 14:58:53 · answer #3 · answered by Robert L 7 · 0⤊ 0⤋
20 = 45 r^3 r^3 = 20/45 = 4/9 r = (4/9)^(1/3) 2nd term = 20 (4/9)^(1/3) 3rd term = 20 (16/81)^(1/3)
2016-05-22 12:56:10 · answer #4 · answered by Anonymous · 0⤊ 0⤋