x+1分之x x=3分之根号3 怎么算成2分之根号3-1
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x/(x+1)
=3x/(3x+3)
=根号3/(根号3+3)
=根号3(3-根号3)/(根号3+3)(3-根号3)
=(3根号3-3)/(9-3)
=(根号3-1)/2
