+0  
 
0
203
1
avatar+946 

2ab/a+b ~Thanks to CPhill 

Julius  Nov 15, 2017
edited by Julius  Nov 15, 2017
 #1
avatar+87309 
+3

Harmonic mean  =  

 

1/ m =      Average of the recipocals  =    (1/a + 1 /b) / 2   =   (a + b) / [2ab]     (1)

 

So....m  is the reciprocal of (1) =   [ 2ab ] / ( a + b)

 

cool cool cool

CPhill  Nov 15, 2017
edited by CPhill  Nov 15, 2017

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