江苏省大丰市大中镇八年级数学下册10.5分式方程(2)作业(新版)苏科版.doc

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110.5 分式方程(2)作业1.对于分式方程3x,有以下说法:最简公分母为(x3)2;转化为整式方程 x23,解得 x5;原方程的解为 x3;原方程无解,其中,正确说法的个数为( )A3 B2 C1 D02.若方程 有增根,,则增根只能是 x=_3.解下列分式方程:(1) x12(2)321x4. 当 m取何值时,分式方程 有增根?xx 1 mx 1【提升题】1. k取何值时,分式方程 xkx3)1(6有根?10.5 分式方程(2)04xm21.解方程:(1) 310 x; (2) 546 2. 例 解下列方程: (1) 301 x ;(2) x 2x 2 x 2x 2 16x2 43解分式方程的一般步骤有哪些?4怎样检验分式方程的根?

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