-1

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/04 06:50:44

-1
-1

-1
IX-2I-IX+1I+2IX-4I
=2-x-x-1+2(4-x)
=1-2x+8-2x
=9-4x

1 1 1 1 1 1 1 -1 1 -1 1 1 1 1 (1~ 1 1 1: