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1、a²/b乘以b/a= () (2)a÷b乘以1/b=()
2、计算
(1)b/a÷b/2a² (2)ac²/3b三次乘以9b/a²c
(3)-b/7xy²÷14ab/x²y (4)x²+xy/x乘以1/x+y
(5)(xy-x²)÷x-y/xy (6)4x²-1/x²+x乘以x+1/1-2x÷1/x
(7)(a²-a)÷a/a-1 (8)x²-1/y÷x+1/²
第二大题,/表示分数线
人气:204 ℃ 时间:2020-02-02 23:25:07
解答
aa/b^2 b/a÷b/2a^2=b/a*2a^2/b=2a ac²/3b^3*9b/a²c=ac²*9b/3b^3*a^2c=3c/a-b/7xy²÷14ab/x²y=-(b*x^2 y/7xy^2*14ab)=-(x/98a)x²+xy/x*1/x+y=x*(x+y)/x*(x+y)=1...
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