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Mathematics 18 Online
OpenStudy (anonymous):

What is the geometric mean of 3 and 21?

hero (hero):

Hint: Geometric mean of a and b: \(x^2 = ab\) In this case, a = 3, b = 21

hero (hero):

Solve for x

OpenStudy (anonymous):

So 3 squared 7?

hero (hero):

Yes \(x = 3 \sqrt{7} \)

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