2.若m等于它的倒数,则分式m-2/m^2-4÷m^2-3m/m-3的值为 A.-1 B.3 C.-1或3 D.-4/18.已知x-3y=0,求x^2-2xy+y^2/2x+y乘(x-y)的值.4.已知a/1+b/1=2/1,则a+b/ab的值是 A.2/1 B.-2/1 C.2 D.-25.式子x+2/x+1÷2x+3/x-2有意义,则x应满足
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![2.若m等于它的倒数,则分式m-2/m^2-4÷m^2-3m/m-3的值为 A.-1 B.3 C.-1或3 D.-4/18.已知x-3y=0,求x^2-2xy+y^2/2x+y乘(x-y)的值.4.已知a/1+b/1=2/1,则a+b/ab的值是 A.2/1 B.-2/1 C.2 D.-25.式子x+2/x+1÷2x+3/x-2有意义,则x应满足](/uploads/image/z/601725-21-5.jpg?t=2.%E8%8B%A5m%E7%AD%89%E4%BA%8E%E5%AE%83%E7%9A%84%E5%80%92%E6%95%B0%2C%E5%88%99%E5%88%86%E5%BC%8Fm-2%2Fm%5E2-4%C3%B7m%5E2-3m%2Fm-3%E7%9A%84%E5%80%BC%E4%B8%BA+A.-1+B.3+C.-1%E6%88%963+D.-4%2F18.%E5%B7%B2%E7%9F%A5x-3y%3D0%2C%E6%B1%82x%5E2-2xy%2By%5E2%2F2x%2By%E4%B9%98%EF%BC%88x-y%29%E7%9A%84%E5%80%BC.4.%E5%B7%B2%E7%9F%A5a%2F1%2Bb%2F1%3D2%2F1%2C%E5%88%99a%2Bb%2Fab%E7%9A%84%E5%80%BC%E6%98%AF+A.2%2F1+B.-2%2F1+C.2+D.-25.%E5%BC%8F%E5%AD%90x%2B2%2Fx%2B1%C3%B72x%2B3%2Fx-2%E6%9C%89%E6%84%8F%E4%B9%89%2C%E5%88%99x%E5%BA%94%E6%BB%A1%E8%B6%B3)
2.若m等于它的倒数,则分式m-2/m^2-4÷m^2-3m/m-3的值为 A.-1 B.3 C.-1或3 D.-4/18.已知x-3y=0,求x^2-2xy+y^2/2x+y乘(x-y)的值.4.已知a/1+b/1=2/1,则a+b/ab的值是 A.2/1 B.-2/1 C.2 D.-25.式子x+2/x+1÷2x+3/x-2有意义,则x应满足
2.若m等于它的倒数,则分式m-2/m^2-4÷m^2-3m/m-3的值为 A.-1 B.3 C.-1或3 D.-4/1
8.已知x-3y=0,求x^2-2xy+y^2/2x+y乘(x-y)的值.
4.已知a/1+b/1=2/1,则a+b/ab的值是 A.2/1 B.-2/1 C.2 D.-2
5.式子x+2/x+1÷2x+3/x-2有意义,则x应满足的条件是 A.x不等于±2且x不等于-2/3
B.x不等于-2且x不等于-2/3 C.x不等于2且x不等于-2/3 D.以上都不对
15.(2)1-a+2b/a-b乘a^2-b^2/a^2+4ab+4b^2
16.先化简,再求值:(x-1/1 +1)除x^2-1/x,其中x=2
2.若m等于它的倒数,则分式m-2/m^2-4÷m^2-3m/m-3的值为 A.-1 B.3 C.-1或3 D.-4/18.已知x-3y=0,求x^2-2xy+y^2/2x+y乘(x-y)的值.4.已知a/1+b/1=2/1,则a+b/ab的值是 A.2/1 B.-2/1 C.2 D.-25.式子x+2/x+1÷2x+3/x-2有意义,则x应满足
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