Hello friends!
Question is:
The harmonic mean of 2 numbers, a and b is
____2____
_1_ + _1_
a______b
The harmonic mean of 3 numbers, a, b and c, is
______3______
_1_ + _1_ + _1_
a______b____c
a) Simplify the expressions for 2 and 3 numbers and find a simplified expression for the harmonic mean of 4 numbers.
b) Find the harmonic mean of the numbers 2, 3, 4 7 and 9.