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math_crasher

what is the geometric mean of 3 and 7?

  • one year ago
  • one year ago

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  1. 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.

    • one year ago
  2. estudier
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    Square root of product

    • one year ago
  3. math_crasher
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    I thought I multiply the two and find the square root?

    • one year ago
  4. estudier
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    I repeat Square root of product

    • one year ago
  5. RiOT
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    Don't listen to me... O_O I may very well be wrong.

    • one year ago
  6. math_crasher
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    so I should square root 21?

    • one year ago
  7. estudier
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    Yes

    • one year ago
  8. math_crasher
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    but that just gets a weird number

    • one year ago
  9. estudier
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    If it was 3 numbers, then cube root of 3 multiplied together....

    • one year ago
  10. math_crasher
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    ah i see

    • one year ago
  11. estudier
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    It's just a different kind of average....

    • one year ago
  12. math_crasher
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    So would I do something like 2*square root of the product?

    • one year ago
  13. estudier
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    Nope, just sqrt 21, that's the GM

    • one year ago
  14. math_crasher
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    so I just leave it at square root 21?

    • one year ago
  15. estudier
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    Yup

    • one year ago
  16. math_crasher
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    why's that?

    • one year ago
  17. estudier
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    What do you mean?

    • one year ago
  18. math_crasher
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    why do i leave it at \[\sqrt{21}\] ?

    • one year ago
  19. estudier
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    Is there something wrong with sqrt 21 ?

    • one year ago
  20. math_crasher
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    don't I have to actually sqaure root it and make it X *\[\sqrt{X}\]

    • one year ago
  21. math_crasher
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    or something like that?

    • one year ago
  22. 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

    • one year ago
  23. math_crasher
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    oh ok thanks

    • one year ago
  24. estudier
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    ur welcome

    • one year ago
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