江苏省大丰市大中镇八年级数学下册10.5分式方程(1)作业(新版)苏科版.doc

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110.5 分式方程(1)作业1. 分式方程 321x的解是( )A 0 B 1 C 2x D 3x 2. 若25xx与互为相反数,则的值为 。A.6B. 6 C.32D.233.已知 152yx,试用 x 的代数式表示 y=_4. 已知 x=1 是分式方程k3的解,则实数 k= _ 5. 解下列分式方程(1) 432x(2)0321x(3) 123x(4) xx212210.5 分式 方程(1)板书设计1.分式方程的概念:分母中含有未知数的方程,叫做分式方程2 下列方程中,哪些是分式方程,为什么?(1)105 x; (2)5 x; (3); (4)132 y注意:分母中含有未知数例 1 解方程:(1) 20 x;(2) 1 x

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