一,若分子x(x-3)/x²+2的值为0,则分式2x/x²-1除2x/1-x的值为_________.二,如果x等于它的倒数,那么分式x²+2x-3/x-1除x+2/x²-3x+1的值是_________.三 已知/a-4/+ √b-9 =0 求a²+ab/b²乘a²-ab
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![一,若分子x(x-3)/x²+2的值为0,则分式2x/x²-1除2x/1-x的值为_________.二,如果x等于它的倒数,那么分式x²+2x-3/x-1除x+2/x²-3x+1的值是_________.三 已知/a-4/+ √b-9 =0 求a²+ab/b²乘a²-ab](/uploads/image/z/1625642-26-2.jpg?t=%E4%B8%80%2C%E8%8B%A5%E5%88%86%E5%AD%90x%EF%BC%88x-3%EF%BC%89%2Fx%26%23178%3B%2B2%E7%9A%84%E5%80%BC%E4%B8%BA0%2C%E5%88%99%E5%88%86%E5%BC%8F2x%2Fx%26%23178%3B-1%E9%99%A42x%2F1-x%E7%9A%84%E5%80%BC%E4%B8%BA_________.%E4%BA%8C%2C%E5%A6%82%E6%9E%9Cx%E7%AD%89%E4%BA%8E%E5%AE%83%E7%9A%84%E5%80%92%E6%95%B0%2C%E9%82%A3%E4%B9%88%E5%88%86%E5%BC%8Fx%26%23178%3B%2B2x-3%2Fx-1%E9%99%A4x%2B2%2Fx%26%23178%3B-3x%2B1%E7%9A%84%E5%80%BC%E6%98%AF_________.%E4%B8%89+%E5%B7%B2%E7%9F%A5%2Fa-4%2F%2B+%E2%88%9Ab-9+%3D0+%E6%B1%82a%26%23178%3B%2Bab%2Fb%26%23178%3B%E4%B9%98a%26%23178%3B-ab)
一,若分子x(x-3)/x²+2的值为0,则分式2x/x²-1除2x/1-x的值为_________.二,如果x等于它的倒数,那么分式x²+2x-3/x-1除x+2/x²-3x+1的值是_________.三 已知/a-4/+ √b-9 =0 求a²+ab/b²乘a²-ab
一,若分子x(x-3)/x²+2的值为0,则分式2x/x²-1除2x/1-x的值为_________.
二,如果x等于它的倒数,那么分式x²+2x-3/x-1除x+2/x²-3x+1的值是_________.三 已知/a-4/+ √b-9 =0 求a²+ab/b²乘a²-ab/a²-b²
一,若分子x(x-3)/x²+2的值为0,则分式2x/x²-1除2x/1-x的值为_________.二,如果x等于它的倒数,那么分式x²+2x-3/x-1除x+2/x²-3x+1的值是_________.三 已知/a-4/+ √b-9 =0 求a²+ab/b²乘a²-ab
若是[x(x-3)]/(x^2+2)=0,则解如下:
∵x(x-3)/(x^2+2)=0
∴x(x-3)=0
解之得:x=0,x=3
∴当x=0时,[2x/(x^2-1)]/[2x/(1-x)]无解.
当x=3时,[2x/(x^2-1)]/[2x/(1-x)]=-1/(x+1)
=-1/4
若x=1/x,则x=1
∴x-1=0
∴[(x^2+2x-3)/(x-1)]/[(x+2)/(x^2-3x+1)]无解
最后一题,已知条件看不懂.