How do you find the geometric mean between 81 and 4?

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Answer 1 · 2018-06-01T16:11:31

#18#

the geometric mean of two numbers#" "a,b#

#G_m=sqrt(ab)#

we have

#G_m=sqrt(4xx81)#

#=9xx2=18#

Answer 2 · 2018-06-01T16:14:19

#G=sqrt(81xx4)=sqrt(9^2xx2^2)=9xx2=18#

We know that,

Geometric Mean #G# of two numbers #a and b # is :

#G=sqrt(ab)#

Let, #a=81 and b=4#

So,

#G=sqrt(81xx4)=sqrt(9^2xx2^2)=9xx2=18#