Harmonic mean

If x, y, and z form a harmonic progression, y is the harmonic mean of x and z. Find the harmonic mean of the numbers 6 and 5.

Correct answer:

y =  5.4545

Step-by-step explanation:

x=6 z=5  x1=1/x=1/6=610.1667 x3=1/z=1/5=51=0.2  d=(x3x1)/2=(0.20.1667)/2=6010.0167 x2=x1+d=0.1667+0.0167=60110.1833  y=1/x2=1/0.1833=5.4545

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Showing 1 comment:
what is −21 ​− 5/3 ​ =

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