How do you compare the two numbers? Which number is bigger, 2S / (V1 + V2) or s (V1 + V2) / 2v1v2?

How do you compare the two numbers? Which number is bigger, 2S / (V1 + V2) or s (V1 + V2) / 2v1v2?

The two numbers are compared
[2S/(V1+V2)][2V1V2/S(V1+V2)]
=4V1V2/(V1+V2)^2=4V1V2/[(V1-V2)^2+4V1V2]
When V1 = V2, because the ratio is equal to 1, the two numbers are equal
When V1 ≠ V2, because the above ratio is less than 1, the first number is less than the second number

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