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请选择一组a、b的值,写出一个形如=b的关于x的分式方程,使它的解为x=-1,这...
请选择一组a、b的值,写出一个形如
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=b的关于x的分式方程,使它的解为x=-1,这样的分式方程可以是
.
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下列等式中,不正确的是( )
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