What is the geometric mean of 81 and 4?

3 Answers
Feb 20, 2018

The GM of 81and4, by definition, is 81×4=18.

814=92=18

Explanation:

Geometric mean of a and b = Square root of (a x b)

Feb 20, 2018

see a solution process below;

Explanation:

We can say let those two digits be represented by xandz

Hence;

x=81

z=4

Geometric Mean =y

Recall;

Geometric Mean y=xz

y=xz

Substituting the values..

y=81×4

y=324

y=18

Hence the Geometric Mean of 81 and 14 is 18.

Hope this helps!