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mean is the average, so 2 + 4 = 6; 6 / 2 = 3
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The above is the arithmetic mean which is NOT the same thing as the geometric mean.
The geometric mean of n non-negative numbers is the nth root of their product.
So GM(2, 4) = sqrt(8) = 2.828 (approx).
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Their geometric mean is:sqrt(42*(1/9)2)=sqrt(16*(1/81))=sqrt(16/81)=4/9-------------------The geometric mean of a set of n terms is equal to the nth root of the product of those n terms. The geometric mean of 4 and 1/9 is sqrt(4*(1/9)) = sqrt(4/9) = 2/3.
The geometric mean of 2 and 22 is 6.63324958071
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+sqrt(2*5) = + sqrt(10) = 3.1623 (to 4 dp)
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