题目
题型:南京模拟难度:来源:
x2 |
3 |
y2 |
4 |
答案
x2 |
3 |
y2 |
4 |
设A(x1,y1),B(x2,y2),则x1+x2=-
6 |
7 |
9 |
7 |
∴AB=
(1+1)[(-
|
24 |
7 |
同理,可得CD=CF+DF=
24 |
7 |
∵AF+BF+AB=4a=8,
∴AF+BF=8-AB=8-
24 |
7 |
∴AF+BF+CF+DF=(8-
24 |
7 |
24 |
7 |
答案:8.
核心考点
举一反三
x2 |
3 |
y2 |
4 |
x2 |
3 |
y2 |
4 |
6 |
7 |
9 |
7 |
(1+1)[(-
|
24 |
7 |
24 |
7 |
24 |
7 |
24 |
7 |
24 |
7 |