2 |
n |
m |
A.
| B.
| C.
| D.2 |
y1+y2 |
x1+x2 |
y0 |
x0 |
2 |
y2-y1 |
x2-x1 |
y1-y2 |
x1-x2 |
m(x1+x2) |
n(y1+y2) |
m(x1+x2) |
n(y1+y2) |
m |
n |
| ||
2 |
n |
m |
| ||
2 |
x2 |
3b2 |
y2 |
b2 |
OR1 |
OR2 |
x2 |
16 |
y2 |
4 |
A.2
| B.±2
| C.-4
| D.±4
|
x2 |
2 |
y2 |
4 |
A.y=-2x-1 | B.y=-
| C.y=-2x+3 | D.y=-
|
x2 |
m |
y2 |
8 |
|
A.(0,4] | B.[4,+∞) | C.(0,2] | D.[2,+∞) |
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