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If you have any views on the fortune of traditional numerology or the eight-character "marriage numerology prediction"! Master Ta (Koucai \ wei/:3996,19,4)
X 1, x2∈(-∞0] and x 1 < x2, then
f(x 1)-f(x2)=(2x 1+2-x 1)-(2 x2+2 x2)=(2x 1 2x 1- 1 2 x2)=(2x 1-2 x2)(2x 12 x2- 1)2x 12 x2
∵x 1