∴a、b、c中二负一正,
又b+c=-a,c+a=-b,a+b=-c,
∴
b+c |
|a| |
c+a |
|b| |
a+b |
|c| |
−a |
|a| |
−b |
|b| |
−c |
|c| |
而当a>0时,
−a |
|a| |
−a |
|a| |
∴
−a |
|a| |
−b |
|b| |
−c |
|c| |
∴
b+c |
|a| |
c+a |
|b| |
a+b |
|c| |
故答案为:1.
b+c |
|a| |
c+a |
|b| |
a+b |
|c| |
b+c |
|a| |
c+a |
|b| |
a+b |
|c| |
−a |
|a| |
−b |
|b| |
−c |
|c| |
−a |
|a| |
−a |
|a| |
−a |
|a| |
−b |
|b| |
−c |
|c| |
b+c |
|a| |
c+a |
|b| |
a+b |
|c| |