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28 December, 17:10

What is the geometric mean of 9 and 16

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Answers (2)
  1. 28 December, 17:20
    0
    To find the geometric mean, write and solve 9/x = x/16.

    Cross multiply the proportion: x² = 144

    Square root both sides: x = plus or minus 12
  2. 28 December, 17:33
    0
    12

    Step-by-step explanation:

    To find the geometric mean of 2 numbers, multiply them together and then take the square root

    gm = sqrt (9*16)

    sqrt (ab) = sqrt (a) sqrt (b)

    = sqrt (9) sqrt (16)

    = 3 * 4

    gm = 12
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