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同乘以6得 3(x-3)-(x+3)>2(4+5x) 3x-9-x-3>8+10x 2x-12>10x+8 則8x<-20 x<-5/2
對於x>0 x^(2/3)>x^(3/5)=> x^(2/3)/x^(3/5)>1 x^(1/15)>1 x>1 對於x0 x^(3/5)
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