桂林百姓网二手自卸车:绝对值问题
来源:百度文库 编辑:高考问答 时间:2024/05/24 02:45:54
若A<0,化简7A+8|A|
-A
7A+8|A|
=7A-8A
=-A
7A+8|A|
=7A-8A
=-a
7A+8|A|
=7A-8A
= -A
7A+8|A|=7A-8A=-A
A<0 绝对值大于0 所以-A大于0
A<0 |A|=-A
7A+8|A|=7A-8A=-A
-A
7A+8|A|
=7A-8A
=-A
7A+8|A|
=7A-8A
=-a
7A+8|A|
=7A-8A
= -A
7A+8|A|=7A-8A=-A
A<0 绝对值大于0 所以-A大于0
A<0 |A|=-A
7A+8|A|=7A-8A=-A