x2 |
8 |
y2 |
4 |
3 |
PQ |
QA |
QB |
8 |
3 |
x2 |
a2 |
y2 |
b2 |
x2 |
8 |
y2 |
4 |
3 |
b |
a |
3 |
y2 |
3 |
4 |
k |
PQ |
QA |
4 |
k |
4 |
k |
-
| ||
x1+
|
4 |
kx1+4 |
4 |
kx2+4 |
4 |
kx1+4 |
4 |
kx2+4 |
8 |
3 |
y2 |
3 |
8k |
3-k2 |
19 |
3-k2 |
ADB |
EM |
MB |
EN |
NB |
A.锐角三角形 | B.直角三角形 | C.不确定 | D.钝角三角形 |
x2 |
a2 |
y2 |
b2 |
| ||
2 |
2
| ||
5 |
1 |
2 |
2 |
x2 |
a2 |
y2 |
b2 |
A.
| B.3 | C.
| D.
|
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