题目
题型:不详难度:来源:
y2 |
16 |
x2 |
9 |
3 |
答案
y2 |
16 |
x2 |
9 |
y2 |
16 |
x2 |
9 |
∵双曲线经过点A(-3,2
3 |
∴λ=
12 |
16 |
9 |
9 |
1 |
4 |
∴与双曲线
y2 |
16 |
x2 |
9 |
4x2 |
9 |
y2 |
4 |
其右焦点坐标为(
5 |
2 |
∴焦点到一条渐近线的距离是
|4×
| ||
|
故答案为 2
核心考点
举一反三
y2 |
16 |
x2 |
9 |
3 |
y2 |
16 |
x2 |
9 |
y2 |
16 |
x2 |
9 |
3 |
12 |
16 |
9 |
9 |
1 |
4 |
y2 |
16 |
x2 |
9 |
4x2 |
9 |
y2 |
4 |
5 |
2 |
|4×
| ||
|