题目内容：
25.{x1+x2-3x3-x4=1,3x1-x2-3x3+4x4=4,x1+5x2-9x3_8x4=0
参考答案：
选择题：25.{x1+x2-3x3-x4=1,3x1-x2-3x3+4x4=4,x1+5x2-9x3_8x4
- 题目分类：华南农业大学-高等数学（专升本）
- 题目类型：选择题
- 查看权限：VIP
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