(x+1)2+(y-1)2-2xy |
x-y+1 |
(x+1)2+(y-1)2-2xy |
x-y+1 |
x2+2x+1+y2-2y+1-2xy |
x-y+1 |
x2+y2+2x-2y-2xy+1+1 |
x-y+1 |
(x-y+1)2+1 |
x-y+1 |
1 |
x-y+1 |
1 |
x-y+1 |
1 |
x-y+1 |
kπ+1 |
2 |
kπ+1 |
2 |
1 |
4 |
1 |
4 |
1 |
3 |
. |
BA |
. |
BC |
6 |
2 |
π |
6 |
A.
| B.
| C.
| D.
|
AB |
AC |
BC |
10 |
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