问题
解答题
1
|
答案
1
-(21 3
-1 2
)+(-12 3
+12 3
)1 2
=1
-21 3
+1 2
-12 3
+12 3 1 2
=1
+1 3
-12 3
-22 3
+11 2 1 2
=
-11 3
=-
.2 3
1
|
1
-(21 3
-1 2
)+(-12 3
+12 3
)1 2
=1
-21 3
+1 2
-12 3
+12 3 1 2
=1
+1 3
-12 3
-22 3
+11 2 1 2
=
-11 3
=-
.2 3