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What is the geometric mean of 9 and 18
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What is the geometric mean of 9 and 18

User Grekier
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\cfrac{9}{x}~~ = ~~\cfrac{x}{18}\implies 162=x^2\implies √(162)=x\implies √(9^2\cdot 2)=x\implies 9√(2)=x

User Liset
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