Question

已知x<y+z,化简|x-y-z|=____

Answer 1

原式=Ix-(y+z)I,因为x<y+z,所以x-(y+z)<0,原式=y+z-x.

Answer 2

x<y+z,
|x-y-z|=|x-(y+z)|=y+z-x

Answer 3

-x+y+z
因为x-y-z<0