What is the geometric mean of 9 and 18

Mathematics

1 answer:

klemol [59]3 years ago

5 0

$\cfrac{9}{x}~~ = ~~\cfrac{x}{18}\implies 162=x^2\implies \sqrt{162}=x\implies \sqrt{9^2\cdot 2}=x\implies 9\sqrt{2}=x$

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