math_crasher
what is the geometric mean of 3 and 7?
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RiOT
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To find the mean of something, you add the terms and then divide by the amount of them. So, they equal 10 and there are two of them. 10/2 = 5. The mean should be 5.
estudier
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Square root of product
math_crasher
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I thought I multiply the two and find the square root?
estudier
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I repeat Square root of product
RiOT
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Don't listen to me... O_O I may very well be wrong.
math_crasher
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so I should square root 21?
estudier
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Yes
math_crasher
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but that just gets a weird number
estudier
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If it was 3 numbers, then cube root of 3 multiplied together....
math_crasher
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ah i see
estudier
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It's just a different kind of average....
math_crasher
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So would I do something like 2*square root of the product?
estudier
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Nope, just sqrt 21, that's the GM
math_crasher
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so I just leave it at square root 21?
estudier
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Yup
math_crasher
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why's that?
estudier
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What do you mean?
math_crasher
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why do i leave it at \[\sqrt{21}\] ?
estudier
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Is there something wrong with sqrt 21 ?
math_crasher
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don't I have to actually sqaure root it and make it
X *\[\sqrt{X}\]
math_crasher
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or something like that?
estudier
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I don't understand, the square root of 21 is roughly 4.5825, unless you are asked to give a decimal approximation, just leave it as sqrt 21
math_crasher
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oh ok thanks
estudier
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ur welcome