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Their geometric mean is:

sqrt(42*(1/9)2)=

sqrt(16*(1/81))=

sqrt(16/81)=

4/9

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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.

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Q: What is the geometric mean of 4 and 1 ninth?
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