GM(4, 12) = sqrt(4*12) = sqrt(48) = 6.93 (approx)
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geometric mean of 14 and 24=√(14x24)=√336=4√21
To find the ARITHMETIC mean of 4 and 10, you add them up and then divide by n number of values: (4+10)/2 = 7 To find the GEOMETRIC mean, you multiply 4 and 10, and then find the nth root: the square root of 40 is 6.32 (to 3 significant figures).
4, -1236, -108 is not a geometric system.
GM of two numbers is the square root of their product, which in this case is 48, Sqrt 48 is (almost 7) sqrt 16 x sqrt 3 = 4 x sqrt 3 = 4 x 1.732 = 6.93 to the nearest hundredth.