Question

Find the geometric mean between 2 and 8.

Question 2 options:

a) 4

b) 5

c) 10

d) 16

Answer 1

The geometric mean, \(b\), of \(a\) and \(c\) is given by the proportion

\( \dfrac{a}{b} = \dfrac{b}{c} \).

Solving for b you get:

\(b^2 = ac\)

\( b = \sqrt{ac} \)


All you need to remember is the last line:

\( b = \sqrt{ac} \)

Answer 2

phii :DD

Answer 3

math gave you the formula. if you have two numbers a and b
their geometric mean is sqrt(a*b)

can you find the geometric mean of 2 and 8 ?

Answer 4

the formula means multiply the two numbers
then take the square root

Answer 5

4?

Answer 6

step by step: 2*8 = 16
square root of 16 is 4 (because 4*4= 16)

so 4.

Answer 7

ok thanks :DD

Answer 8

correct