若a,b,c,d是四个有理数,且a/b=1/2,c/d=-1/3,c/d=1/4,则a/d的值是
人气：387 ℃ 时间：2019-10-26 19:56:48
解答
(a/b) * (b/d) * (c/d) = (1/2) * (-1/3) * (1/4) (a/d)*(c/d) =(1/2) * (-1/3) * (1/4) (a/d)*(1/4) =(1/2) * (-1/3) * (1/4) （a*d）= -1/6
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