若ab大于0,则有_ ,若ab=0,则有_,如果a+b大于0,ab小于0,则有___.

来源：学生作业帮助网编辑：六六作业网时间：2024/12/25 02:31:49

若ab大于0,则有___,若ab=0,则有_____,如果a+b大于0,ab小于0,则有_____.若ab大于0,则有___,若ab=0,则有_____,如果a+b大于0,ab小于0,则有_____.

若ab大于0,则有___ ,若ab=0,则有_____,如果a+b大于0,ab小于0,则有_____.
若ab大于0,则有___ ,若ab=0,则有_____,如果a+b大于0,ab小于0,则有_____.

若ab大于0,则有___ ,若ab=0,则有_____,如果a+b大于0,ab小于0,则有_____.
若ab大于0,则有_a,b同号__ ,若ab=0,则有_a=0或b=0或a,b都＝0____,如果a+b大于0,ab小于0,则有_a>-b>0>b____.速度!