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设椭圆的两个焦点分别为F1、、F2,过F2作椭圆长轴的垂线交椭圆于点P,若△F1PF2为等...
试题详情
设椭圆的两个焦点分别为F
1、、F
2,过F
2作椭圆长轴的垂线交椭圆于点P,若△F
1PF
2为等腰直角三角形,则椭圆的离心率是( )
A.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAATlJREFU
SEvVVIENhCAMxI3cxy0YgiXYwQGYg8QdWKJPUbHQajWfj3kSo5JyXK/tDZCX6dYwDP2W+F+OIkC/
crS0Le79C0D0qNP6+NikoqeQAtj9EH5nEBtSBVEBUoxwhAOkYMHYUPdUACY9pvMNADJ4lELLIIIn
t5cmhHnaFJ4OYU4aKXoPbQ0ywDzP5aAbDYxuKd9SJyL1roJrbL22MFlZMIAsHM0b8v8O1lRhytSR
BQUoZdubqL6PVBqAxY1gRiemcDZdrA+QxfvTeNsMNjMSRNomj4nX7rdlfHItib3vXScX/AiAOlA3
PMyAGTPqQHl0vGBj9AxLQXMgnUEfgelIY7jFqSJGb8Qx3u+5Bmj0kOt4AZAgWO5AtzWI3gKx/9M+
FRkw+yIOpDJA0a4cSAV4OlNqGTXA9wE+hozxSbXgI+QAAAAASUVORK5CYII=
)
B.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAAkCAYAAABxE+FXAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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=
)
C.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAASCAYAAACjMAXnAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAQFJREFU
SEvFlIsNhSAMAGEj93ELhmAJdmAA5iBxB5boowg8vqYqiSRGSYDrtRUOfrDFg3NOOxHhq4cnk46k
rSId9V90D24Vpv58hAF3E9Yup8OdAaFs3G9BYQB5/iyKDj6RY87aytQZ8dq+gl/I9TXHKBeaX8l1
cKsYlGyc535IfZHekyAva17I1fAqRc/qHe+N6eZSroA7MEJBar3n6HBpjbc3cnmVVQLM238sIsfw
Xi7AscOr8vm6kHtO77En9mw7go/k2Lih6OnXWgeo3Bhs8gjfLXwmt+56DRk47Uv4ldw6uIfuvtHQ
nn69vmnrZu8hN2Cb/AaOsaD9J+YpEVT4D3Utff8Hl115AAAAAElFTkSuQmCC
)
D.
相关试题
-
设椭圆的两个焦点分别为F1、、F2,过F2作椭圆长轴的垂线交椭圆于点P,若△F1PF2为等腰直角三角形,则椭圆的离心率是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAATlJREFU
SEvVVIENhCAMxI3cxy0YgiXYwQGYg8QdWKJPUbHQajWfj3kSo5JyXK/tDZCX6dYwDP2W+F+OIkC/
crS0Le79C0D0qNP6+NikoqeQAtj9EH5nEBtSBVEBUoxwhAOkYMHYUPdUACY9pvMNADJ4lELLIIIn
t5cmhHnaFJ4OYU4aKXoPbQ0ywDzP5aAbDYxuKd9SJyL1roJrbL22MFlZMIAsHM0b8v8O1lRhytSR
BQUoZdubqL6PVBqAxY1gRiemcDZdrA+QxfvTeNsMNjMSRNomj4nX7rdlfHItib3vXScX/AiAOlA3
PMyAGTPqQHl0vGBj9AxLQXMgnUEfgelIY7jFqSJGb8Qx3u+5Bmj0kOt4AZAgWO5AtzWI3gKx/9M+
FRkw+yIOpDJA0a4cSAV4OlNqGTXA9wE+hozxSbXgI+QAAAAASUVORK5CYII=
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAAkCAYAAABxE+FXAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAXtJREFU
WEftl42NwyAMhclG2SdbMESWYIcMwBxI3YElfJgmKT8mYDd3J1WNVLUhgY/3MNidIFyquKZpKpvI
e6LrUL/zJYSXV3hINd/eRlI+C+4taKXB+ty8MeXOYFw8P8bx7D/7SuA46wMYFSjQpYTudBwYiXLv
HKRueatBaZu1ddkghFcDo43/BUflh+3O7HFwxEP6ncXGLcrDIGzV6F0Lvi17JC+nw6197owJw0iu
BnzbtjjaOiuY10f8TcHRbu4ue02zZ3t04Km+gocgy7ZXuB+eyL49j3Mi7ZcdMksIGFSfwuPWqgJK
av/FCfdYZ1DzStouWelen+p4RfWflVgaFvxN4m7B62C6OLWok0zYFndVLyh+8/kXPu5uWtWIkswL
xbM9rWpiphKUVYlMFvyeqkaqvFwcXILhDFOvLEt5zVbj2Y2IKjk8W//xeE3fFMI9WP1+WhXBnan/
AEi0s+FVOcWpaooZsuB0qSy3nwWXWHvV5wu/29Gh8X4ADte30b8uFNoAAAAASUVORK5CYII=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAASCAYAAACjMAXnAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAQFJREFU
SEvFlIsNhSAMAGEj93ELhmAJdmAA5iBxB5boowg8vqYqiSRGSYDrtRUOfrDFg3NOOxHhq4cnk46k
rSId9V90D24Vpv58hAF3E9Yup8OdAaFs3G9BYQB5/iyKDj6RY87aytQZ8dq+gl/I9TXHKBeaX8l1
cKsYlGyc535IfZHekyAva17I1fAqRc/qHe+N6eZSroA7MEJBar3n6HBpjbc3cnmVVQLM238sIsfw
Xi7AscOr8vm6kHtO77En9mw7go/k2Lih6OnXWgeo3Bhs8gjfLXwmt+56DRk47Uv4ldw6uIfuvtHQ
nn69vmnrZu8hN2Cb/AaOsaD9J+YpEVT4D3Utff8Hl115AAAAAElFTkSuQmCC
)
D.
-
设椭圆的两个焦点分别为F1,F2,过F2作椭圆长轴的垂线交椭圆于点P,若△F1PF2为等腰直角三角形,则椭圆的离心率为________.
-
设椭圆的两个焦点分别为F1、、F2,过F2作椭圆长轴的垂线交椭圆于点P,若△F1PF2为等腰直角三角形,则椭圆的离心率是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAATlJREFU
SEvVVIENhCAMxI3cxy0YgiXYwQGYg8QdWKJPUbHQajWfj3kSo5JyXK/tDZCX6dYwDP2W+F+OIkC/
crS0Le79C0D0qNP6+NikoqeQAtj9EH5nEBtSBVEBUoxwhAOkYMHYUPdUACY9pvMNADJ4lELLIIIn
t5cmhHnaFJ4OYU4aKXoPbQ0ywDzP5aAbDYxuKd9SJyL1roJrbL22MFlZMIAsHM0b8v8O1lRhytSR
BQUoZdubqL6PVBqAxY1gRiemcDZdrA+QxfvTeNsMNjMSRNomj4nX7rdlfHItib3vXScX/AiAOlA3
PMyAGTPqQHl0vGBj9AxLQXMgnUEfgelIY7jFqSJGb8Qx3u+5Bmj0kOt4AZAgWO5AtzWI3gKx/9M+
FRkw+yIOpDJA0a4cSAV4OlNqGTXA9wE+hozxSbXgI+QAAAAASUVORK5CYII=
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAAkCAYAAABxE+FXAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAXtJREFU
WEftl42NwyAMhclG2SdbMESWYIcMwBxI3YElfJgmKT8mYDd3J1WNVLUhgY/3MNidIFyquKZpKpvI
e6LrUL/zJYSXV3hINd/eRlI+C+4taKXB+ty8MeXOYFw8P8bx7D/7SuA46wMYFSjQpYTudBwYiXLv
HKRueatBaZu1ddkghFcDo43/BUflh+3O7HFwxEP6ncXGLcrDIGzV6F0Lvi17JC+nw6197owJw0iu
BnzbtjjaOiuY10f8TcHRbu4ue02zZ3t04Km+gocgy7ZXuB+eyL49j3Mi7ZcdMksIGFSfwuPWqgJK
av/FCfdYZ1DzStouWelen+p4RfWflVgaFvxN4m7B62C6OLWok0zYFndVLyh+8/kXPu5uWtWIkswL
xbM9rWpiphKUVYlMFvyeqkaqvFwcXILhDFOvLEt5zVbj2Y2IKjk8W//xeE3fFMI9WP1+WhXBnan/
AEi0s+FVOcWpaooZsuB0qSy3nwWXWHvV5wu/29Gh8X4ADte30b8uFNoAAAAASUVORK5CYII=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAASCAYAAACjMAXnAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAQFJREFU
SEvFlIsNhSAMAGEj93ELhmAJdmAA5iBxB5boowg8vqYqiSRGSYDrtRUOfrDFg3NOOxHhq4cnk46k
rSId9V90D24Vpv58hAF3E9Yup8OdAaFs3G9BYQB5/iyKDj6RY87aytQZ8dq+gl/I9TXHKBeaX8l1
cKsYlGyc535IfZHekyAva17I1fAqRc/qHe+N6eZSroA7MEJBar3n6HBpjbc3cnmVVQLM238sIsfw
Xi7AscOr8vm6kHtO77En9mw7go/k2Lih6OnXWgeo3Bhs8gjfLXwmt+56DRk47Uv4ldw6uIfuvtHQ
nn69vmnrZu8hN2Cb/AaOsaD9J+YpEVT4D3Utff8Hl115AAAAAElFTkSuQmCC
)
D.
-
设椭圆的两个焦点分别为F1、、F2,过F2作椭圆长轴的垂线交椭圆于点P,若△F1PF2为等腰直角三角形,则椭圆的离心率是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAATlJREFU
SEvVVIENhCAMxI3cxy0YgiXYwQGYg8QdWKJPUbHQajWfj3kSo5JyXK/tDZCX6dYwDP2W+F+OIkC/
crS0Le79C0D0qNP6+NikoqeQAtj9EH5nEBtSBVEBUoxwhAOkYMHYUPdUACY9pvMNADJ4lELLIIIn
t5cmhHnaFJ4OYU4aKXoPbQ0ywDzP5aAbDYxuKd9SJyL1roJrbL22MFlZMIAsHM0b8v8O1lRhytSR
BQUoZdubqL6PVBqAxY1gRiemcDZdrA+QxfvTeNsMNjMSRNomj4nX7rdlfHItib3vXScX/AiAOlA3
PMyAGTPqQHl0vGBj9AxLQXMgnUEfgelIY7jFqSJGb8Qx3u+5Bmj0kOt4AZAgWO5AtzWI3gKx/9M+
FRkw+yIOpDJA0a4cSAV4OlNqGTXA9wE+hozxSbXgI+QAAAAASUVORK5CYII=
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAAkCAYAAABxE+FXAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAASCAYAAACjMAXnAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAQFJREFU
SEvFlIsNhSAMAGEj93ELhmAJdmAA5iBxB5boowg8vqYqiSRGSYDrtRUOfrDFg3NOOxHhq4cnk46k
rSId9V90D24Vpv58hAF3E9Yup8OdAaFs3G9BYQB5/iyKDj6RY87aytQZ8dq+gl/I9TXHKBeaX8l1
cKsYlGyc535IfZHekyAva17I1fAqRc/qHe+N6eZSroA7MEJBar3n6HBpjbc3cnmVVQLM238sIsfw
Xi7AscOr8vm6kHtO77En9mw7go/k2Lih6OnXWgeo3Bhs8gjfLXwmt+56DRk47Uv4ldw6uIfuvtHQ
nn69vmnrZu8hN2Cb/AaOsaD9J+YpEVT4D3Utff8Hl115AAAAAElFTkSuQmCC
)
D.
-
设椭圆的两个焦点分别为F1、、F2,过F2作椭圆长轴的垂线交椭圆于点P,若△F1PF2为等腰直角三角形,则椭圆的离心率是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAATlJREFU
SEvVVIENhCAMxI3cxy0YgiXYwQGYg8QdWKJPUbHQajWfj3kSo5JyXK/tDZCX6dYwDP2W+F+OIkC/
crS0Le79C0D0qNP6+NikoqeQAtj9EH5nEBtSBVEBUoxwhAOkYMHYUPdUACY9pvMNADJ4lELLIIIn
t5cmhHnaFJ4OYU4aKXoPbQ0ywDzP5aAbDYxuKd9SJyL1roJrbL22MFlZMIAsHM0b8v8O1lRhytSR
BQUoZdubqL6PVBqAxY1gRiemcDZdrA+QxfvTeNsMNjMSRNomj4nX7rdlfHItib3vXScX/AiAOlA3
PMyAGTPqQHl0vGBj9AxLQXMgnUEfgelIY7jFqSJGb8Qx3u+5Bmj0kOt4AZAgWO5AtzWI3gKx/9M+
FRkw+yIOpDJA0a4cSAV4OlNqGTXA9wE+hozxSbXgI+QAAAAASUVORK5CYII=
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAAkCAYAAABxE+FXAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAASCAYAAACjMAXnAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAQFJREFU
SEvFlIsNhSAMAGEj93ELhmAJdmAA5iBxB5boowg8vqYqiSRGSYDrtRUOfrDFg3NOOxHhq4cnk46k
rSId9V90D24Vpv58hAF3E9Yup8OdAaFs3G9BYQB5/iyKDj6RY87aytQZ8dq+gl/I9TXHKBeaX8l1
cKsYlGyc535IfZHekyAva17I1fAqRc/qHe+N6eZSroA7MEJBar3n6HBpjbc3cnmVVQLM238sIsfw
Xi7AscOr8vm6kHtO77En9mw7go/k2Lih6OnXWgeo3Bhs8gjfLXwmt+56DRk47Uv4ldw6uIfuvtHQ
nn69vmnrZu8hN2Cb/AaOsaD9J+YpEVT4D3Utff8Hl115AAAAAElFTkSuQmCC
)
D.
-
设椭圆的两个焦点分别为F1、、F2,过F2作椭圆长轴的垂线交椭圆于点P,若△F1PF2为等腰直角三角形,则椭圆的离心率是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAATlJREFU
SEvVVIENhCAMxI3cxy0YgiXYwQGYg8QdWKJPUbHQajWfj3kSo5JyXK/tDZCX6dYwDP2W+F+OIkC/
crS0Le79C0D0qNP6+NikoqeQAtj9EH5nEBtSBVEBUoxwhAOkYMHYUPdUACY9pvMNADJ4lELLIIIn
t5cmhHnaFJ4OYU4aKXoPbQ0ywDzP5aAbDYxuKd9SJyL1roJrbL22MFlZMIAsHM0b8v8O1lRhytSR
BQUoZdubqL6PVBqAxY1gRiemcDZdrA+QxfvTeNsMNjMSRNomj4nX7rdlfHItib3vXScX/AiAOlA3
PMyAGTPqQHl0vGBj9AxLQXMgnUEfgelIY7jFqSJGb8Qx3u+5Bmj0kOt4AZAgWO5AtzWI3gKx/9M+
FRkw+yIOpDJA0a4cSAV4OlNqGTXA9wE+hozxSbXgI+QAAAAASUVORK5CYII=
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAAkCAYAAABxE+FXAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAASCAYAAACjMAXnAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAQFJREFU
SEvFlIsNhSAMAGEj93ELhmAJdmAA5iBxB5boowg8vqYqiSRGSYDrtRUOfrDFg3NOOxHhq4cnk46k
rSId9V90D24Vpv58hAF3E9Yup8OdAaFs3G9BYQB5/iyKDj6RY87aytQZ8dq+gl/I9TXHKBeaX8l1
cKsYlGyc535IfZHekyAva17I1fAqRc/qHe+N6eZSroA7MEJBar3n6HBpjbc3cnmVVQLM238sIsfw
Xi7AscOr8vm6kHtO77En9mw7go/k2Lih6OnXWgeo3Bhs8gjfLXwmt+56DRk47Uv4ldw6uIfuvtHQ
nn69vmnrZu8hN2Cb/AaOsaD9J+YpEVT4D3Utff8Hl115AAAAAElFTkSuQmCC
)
D.
-
设椭圆的两个焦点分别为F1、、F2,过F2作椭圆长轴的垂线交椭圆于点P,若△F1PF2为等腰直角三角形,则椭圆的离心率是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAATlJREFU
SEvVVIENhCAMxI3cxy0YgiXYwQGYg8QdWKJPUbHQajWfj3kSo5JyXK/tDZCX6dYwDP2W+F+OIkC/
crS0Le79C0D0qNP6+NikoqeQAtj9EH5nEBtSBVEBUoxwhAOkYMHYUPdUACY9pvMNADJ4lELLIIIn
t5cmhHnaFJ4OYU4aKXoPbQ0ywDzP5aAbDYxuKd9SJyL1roJrbL22MFlZMIAsHM0b8v8O1lRhytSR
BQUoZdubqL6PVBqAxY1gRiemcDZdrA+QxfvTeNsMNjMSRNomj4nX7rdlfHItib3vXScX/AiAOlA3
PMyAGTPqQHl0vGBj9AxLQXMgnUEfgelIY7jFqSJGb8Qx3u+5Bmj0kOt4AZAgWO5AtzWI3gKx/9M+
FRkw+yIOpDJA0a4cSAV4OlNqGTXA9wE+hozxSbXgI+QAAAAASUVORK5CYII=
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAAkCAYAAABxE+FXAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAASCAYAAACjMAXnAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAQFJREFU
SEvFlIsNhSAMAGEj93ELhmAJdmAA5iBxB5boowg8vqYqiSRGSYDrtRUOfrDFg3NOOxHhq4cnk46k
rSId9V90D24Vpv58hAF3E9Yup8OdAaFs3G9BYQB5/iyKDj6RY87aytQZ8dq+gl/I9TXHKBeaX8l1
cKsYlGyc535IfZHekyAva17I1fAqRc/qHe+N6eZSroA7MEJBar3n6HBpjbc3cnmVVQLM238sIsfw
Xi7AscOr8vm6kHtO77En9mw7go/k2Lih6OnXWgeo3Bhs8gjfLXwmt+56DRk47Uv4ldw6uIfuvtHQ
nn69vmnrZu8hN2Cb/AaOsaD9J+YpEVT4D3Utff8Hl115AAAAAElFTkSuQmCC
)
D.
-
设椭圆的两个焦点分别为F1、、F2,过F2作椭圆长轴的垂线交椭圆于点P,若△F1PF2为等腰直角三角形,则椭圆的离心率是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAATlJREFU
SEvVVIENhCAMxI3cxy0YgiXYwQGYg8QdWKJPUbHQajWfj3kSo5JyXK/tDZCX6dYwDP2W+F+OIkC/
crS0Le79C0D0qNP6+NikoqeQAtj9EH5nEBtSBVEBUoxwhAOkYMHYUPdUACY9pvMNADJ4lELLIIIn
t5cmhHnaFJ4OYU4aKXoPbQ0ywDzP5aAbDYxuKd9SJyL1roJrbL22MFlZMIAsHM0b8v8O1lRhytSR
BQUoZdubqL6PVBqAxY1gRiemcDZdrA+QxfvTeNsMNjMSRNomj4nX7rdlfHItib3vXScX/AiAOlA3
PMyAGTPqQHl0vGBj9AxLQXMgnUEfgelIY7jFqSJGb8Qx3u+5Bmj0kOt4AZAgWO5AtzWI3gKx/9M+
FRkw+yIOpDJA0a4cSAV4OlNqGTXA9wE+hozxSbXgI+QAAAAASUVORK5CYII=
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAAkCAYAAABxE+FXAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAXtJREFU
WEftl42NwyAMhclG2SdbMESWYIcMwBxI3YElfJgmKT8mYDd3J1WNVLUhgY/3MNidIFyquKZpKpvI
e6LrUL/zJYSXV3hINd/eRlI+C+4taKXB+ty8MeXOYFw8P8bx7D/7SuA46wMYFSjQpYTudBwYiXLv
HKRueatBaZu1ddkghFcDo43/BUflh+3O7HFwxEP6ncXGLcrDIGzV6F0Lvi17JC+nw6197owJw0iu
BnzbtjjaOiuY10f8TcHRbu4ue02zZ3t04Km+gocgy7ZXuB+eyL49j3Mi7ZcdMksIGFSfwuPWqgJK
av/FCfdYZ1DzStouWelen+p4RfWflVgaFvxN4m7B62C6OLWok0zYFndVLyh+8/kXPu5uWtWIkswL
xbM9rWpiphKUVYlMFvyeqkaqvFwcXILhDFOvLEt5zVbj2Y2IKjk8W//xeE3fFMI9WP1+WhXBnan/
AEi0s+FVOcWpaooZsuB0qSy3nwWXWHvV5wu/29Gh8X4ADte30b8uFNoAAAAASUVORK5CYII=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAASCAYAAACjMAXnAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAQFJREFU
SEvFlIsNhSAMAGEj93ELhmAJdmAA5iBxB5boowg8vqYqiSRGSYDrtRUOfrDFg3NOOxHhq4cnk46k
rSId9V90D24Vpv58hAF3E9Yup8OdAaFs3G9BYQB5/iyKDj6RY87aytQZ8dq+gl/I9TXHKBeaX8l1
cKsYlGyc535IfZHekyAva17I1fAqRc/qHe+N6eZSroA7MEJBar3n6HBpjbc3cnmVVQLM238sIsfw
Xi7AscOr8vm6kHtO77En9mw7go/k2Lih6OnXWgeo3Bhs8gjfLXwmt+56DRk47Uv4ldw6uIfuvtHQ
nn69vmnrZu8hN2Cb/AaOsaD9J+YpEVT4D3Utff8Hl115AAAAAElFTkSuQmCC
)
D.
-
设椭圆的两个焦点分别为F1,F2,过F2作椭圆长轴的垂线交椭圆于点P,若△F1PF2为等腰直角三角形,则椭圆的离心率为________.
-
设椭圆的两个焦点分别为F1、、F2,过F2作椭圆长轴的垂线交椭圆于点P,若△F1PF2为等腰直角三角形,则椭圆的离心率是( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAATlJREFU
SEvVVIENhCAMxI3cxy0YgiXYwQGYg8QdWKJPUbHQajWfj3kSo5JyXK/tDZCX6dYwDP2W+F+OIkC/
crS0Le79C0D0qNP6+NikoqeQAtj9EH5nEBtSBVEBUoxwhAOkYMHYUPdUACY9pvMNADJ4lELLIIIn
t5cmhHnaFJ4OYU4aKXoPbQ0ywDzP5aAbDYxuKd9SJyL1roJrbL22MFlZMIAsHM0b8v8O1lRhytSR
BQUoZdubqL6PVBqAxY1gRiemcDZdrA+QxfvTeNsMNjMSRNomj4nX7rdlfHItib3vXScX/AiAOlA3
PMyAGTPqQHl0vGBj9AxLQXMgnUEfgelIY7jFqSJGb8Qx3u+5Bmj0kOt4AZAgWO5AtzWI3gKx/9M+
FRkw+yIOpDJA0a4cSAV4OlNqGTXA9wE+hozxSbXgI+QAAAAASUVORK5CYII=
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAAkCAYAAABxE+FXAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAASCAYAAACjMAXnAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAQFJREFU
SEvFlIsNhSAMAGEj93ELhmAJdmAA5iBxB5boowg8vqYqiSRGSYDrtRUOfrDFg3NOOxHhq4cnk46k
rSId9V90D24Vpv58hAF3E9Yup8OdAaFs3G9BYQB5/iyKDj6RY87aytQZ8dq+gl/I9TXHKBeaX8l1
cKsYlGyc535IfZHekyAva17I1fAqRc/qHe+N6eZSroA7MEJBar3n6HBpjbc3cnmVVQLM238sIsfw
Xi7AscOr8vm6kHtO77En9mw7go/k2Lih6OnXWgeo3Bhs8gjfLXwmt+56DRk47Uv4ldw6uIfuvtHQ
nn69vmnrZu8hN2Cb/AaOsaD9J+YpEVT4D3Utff8Hl115AAAAAElFTkSuQmCC
)
D.