Suppose that the foci of the ellipse are
where
. Let
be two parabolas with a common vertex at (0,0) and with foci at
respectively. Let
be a tangent to
which passes through
and
be a tangent to
which passes through
. If
is the slope of
and
is the slope of
, then the value of
is
4
3
2
1
The foci are (±ae, 0) i.e. (2, 0) and (–2, 0).
As tangent with slope passes through (–4, 0),
Again for tangent with slope passing through (2, 0),
Study 40% syllabus and score up to 100% marks in JEE