(学生)三元一次方程组典型例题讲解.pdf

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1、第 5 讲三元一次方程组典型例题教学目标：会解三元一次方程组教学重点和难点：能熟练的选择适当的方法解三元一次方程组一、三元一次方程组之特殊型例 1：解方程组yxzyxzyx4225212例 2：解方程组172162152zyxzyxzyx典型例题 3：解方程组20,19,21.xyyzxz例 3：解方程组21327:2:1:zyxzyx典型例题 2：解方程组4:5:2:3:111zyxyzyx二、三元一次方程组之一般型例 4：解方程组34,6,2312.xyzxyzxyz文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9

2、I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q

3、3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 Z

4、V3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2

5、W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档

6、编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6

7、M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3

8、P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4典型例题 3：解方程组2439,32511,56713.xyzxyzxyz三、三元一次方程组的相关变式题型例五、解方程组13423103292zyxzyxzyx例六、已知0432zyx，0543zyx，求zyxzyx的值。例 6 已知方程组)3(4)2(5)1(3axzazyayx的解使代数

9、式zyx32的值等于10，求a的值。文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10

10、 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8

11、T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4

12、文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:C

13、D6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7

14、E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 H

15、I9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4 例 7 甲、乙两同学解方程组1022ycxbyax，已知甲的正确解答是42yx，乙由于看错了c，求出的解是5.63yx，则求cba

16、,的值。四、三元一次方程组的实际应用例一:甲地到乙地全程是 3.3km，一段上坡，一段平路，一段下坡。上坡每小时行 3km，平路每小时行 4km，下坡每小时行 5km，那么，从甲地到乙地要51分钟，乙地到甲地要53.4 分。求甲地到乙地的上坡、平路、下坡的路程各是多少?练习 1.甲、乙、丙三数的和是41，甲数的2 倍比丙数的3 倍大 3，甲、乙两数的比为3:2。求这三个数。文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R

17、10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3

18、Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5

19、A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码

20、:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7

21、M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1

22、 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I1

23、0U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4课时训练试题：解下列方程组（1）275322344yxxyzxz（2）491232137544xyyzxz（3）3743225xyyzxz（4）491731518232xzxyzxyz（5）76710020320 xyzxyzxyz（6）2439325115680 xyzxyzxyz（7）3232443210 xyzxyzxyz（8）26363127343411xyzxyzxyz（9）:1

24、:2:32315x y zxyz（10）123xyyzzx文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI

25、9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2

26、Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10

27、ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T

28、2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文

29、档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4文档编码:CD6M7M7E3P1 HI9I10U2Q3R10 ZV3Q8T2W5A4