Cmr: $\frac{(x_1-x_2)(x_2-x_3)(x_3-x_1)}{x_1x_2x_3}\ge0$
Cmr: $\frac{(x_1-x_2)(x_2-x_3)(x_3-x_1)}{x_1x_2x_3}$
Started By huenguyen1, 17-10-2017 - 06:09
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Posted 17-10-2017 - 16:54
TrucCumgarDaklak
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Cmr: $\frac{(x_1-x_2)(x_2-x_3)(x_3-x_1)}{x_1x_2x_3}\ge0$
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