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OpenStudy (anonymous):
What is the geometric mean of 3 and 21?
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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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