Let E be an ellipse whose axes are parallel to the co-ordinates axes, having its centre at (3,-4), one focus at (4,-4) and one vertex at (5,-4). If mx-y=4, m>0 is a tangent to the ellipse E, then the value of is equal to
4
5
3
2
:The equation of ellipse is
Now, vertex is (5, –4)
Distance between centre and focus is ae
ae = 1
Now, equation of tangent is,
But given tangent is, mx – y = 4
Study 40% syllabus and score up to 100% marks in JEE