第八章-二元一次方程组-小结与复习VIP免费

第八章 二元一次方程组小结与复习 总结二元一次方程组的有关概念、解法及运用二元一次方程组解决实际问题的基本过程 .学习目标： 本章知识结构概念解法运用二元一次方程（组） 巩固与提高 第一阶段：巩固训练 下列方程中，二元一次方程共有（ ） 13xy 2 362xx 342yx  142yx  6 32mnm  54abA. 1 个B. 2 个C. 3 个D. 4 个 00:40 00:39 00:38 00:37 00:36 00:35 00:34 00:33 00:32 00:31 00:30 00:29 00:28 00:27 00:26 00:25 00:24 00:23 00:22 00:21 00:20 00:19 00:18 00:17 00:16 00:15 00:14 00:13 00:12 00:11 00:10 00:09 00:08 00:07 00:06 00:05 00:04 00:03 00:02 00:01时间到1C 2323. .22133. . 2232xyxyABxyyzxxxyyCDxyyx  下列方程组是二元一次方程组的是（ ） 00:40 00:39 00:38 00:37 00:36 00:35 00:34 00:33 00:32 00:31 00:30 00:29 00:28 00:27 00:26 00:25 00:24 00:23 00:22 00:21 00:20 00:19 00:18 00:17 00:16 00:15 00:14 00:13 00:12 00:11 00:10 00:09 00:08 00:07 00:06 00:05 00:04 00:03 00:02 00:01时间到A 31.1xAy0.12xBy1.0xCy1.1xDy 二元一次方程有无数多个解，下列四组值中不是该方程的解的是（ ）21xy 00:40 00:39 00:38 00:37 00:36 00:35 00:34 00:33 00:32 00:31 00:30 00:29 00:28 00:27 00:26 00:25 00:24 00:23 00:22 00:21 00:20 00:19 00:18 00:17 00:16 00:15 00:14 00:13 00:12 00:11 00:10 00:09 00:08 00:07 00:06 00:05 00:04 00:03 00:02 00:01时间到A 4124yxxy  用代入消元法解方程组时，代入正确的是（ ）.24A xx .224B xx .224C xx 00:40 00:39 00:38 00:37 00:36 00:35 00:34 00:33 00:32 00:31 00:30 00:29 00:28 00:27 00:26 00:25 00:24 00:23 00:22 00:21 00:20 00:19 00:18 00:17 00:16 00:15 00:14 00:13 00:12 00:11 00:10 00:09 00:08 00:07 00:06 00:05 00:04 00:03 00:02 00:01时间到.24D xx C 1.2xAy2.3xBy2.1xCy...