Question 1183355
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<pre>

Geometric mean of two positive real numbers  x  and  y  is the square root of their product


    +----------------------------------------------+
    |    geometric mean of  x, y  is   {{{sqrt(xy)}}}.       |
    +----------------------------------------------+


In your case,  it is  {{{sqrt(3*27)}}} = {{{sqrt(81)}}} = 9.    <U>ANSWER</U>
</pre>

Solved and explained.


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To learn more on the subject, &nbsp;look into the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/Average/Geometric-Mean.lesson>WHAT IS Geometric mean</A>

in this site.



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What is important to remember is that the geometric mean is defined for positive real numbers, &nbsp;ONLY.