Geometric mean = sqrt(5*80) = sqrt(400) = 20
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Geometric Mean (2, 40) = sqrt(2*40) = sqrt(80) = sqrt(16*5) = 4*sqrt(5) = 8.944 (approx).
The geometric mean of 4 and 5 is 4.472135955
Geometric mean of 5 and 15= √(5x15)=√75=5√3
it is 10
Two numbers can have only one geometric mean. The geometric mean of 5 and 135 is +sqrt(5*135) = +sqrt(675) = 15*sqrt(3) = 25.98