MEDIUM
JEE Main
IMPORTANT
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Let the normal at the point P on the parabola y2=6x pass through the point 5,-8. If the tangent at P to the parabola intersects its directrix at the point Q, then the ordinate of the point Q is

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Important Questions on Parabola

HARD
JEE Main
IMPORTANT
Let the common tangents to the curves 4x2+y2=9 and y2=4x intersect at the point Q. Let an ellipse, centered at the origin O, has lengths of semi-minor and semi-major axes equal to OQ and 6, respectively. If e and l respectively denote the eccentricity and the length of the latus rectum of this ellipse, then le2 is equal to ______.
HARD
JEE Main
IMPORTANT
A circle of radius 2 unit passes through the vertex and the focus of the parabola y2=2x and touches the parabola y=x-142+α, where α>0. Then 4α-82 is equal to ______.
HARD
JEE Main
IMPORTANT
If the equation of the parabola, whose vertex is at 5,4 and the directrix is 3x+y-29=0, is x2+ay2+bxy+cx+dy+k=0, then a+b+c+d+k is equal to
EASY
JEE Main
IMPORTANT
If vertex of parabola is 2,-1 and equation of its directrix is 4x-3y=21, then the length of latus rectum is
MEDIUM
JEE Main
IMPORTANT
Let P:y2=4ax, a>0 be a parabola with focus S.Let the tangents to the parabola P make an angle of π4 with the line y=3x+5 touch the parabola P at A and B. Then the value of a for which A, B and S are collinear is:
HARD
JEE Main
IMPORTANT
The sum of diameters of the circles that touch the parabola 75x2=645y-3 at the point 85,65 and the y-axis, is equal to _____ .
HARD
JEE Main
IMPORTANT
The tangents at the points A1,3 and B1,-1 on the parabola y2-2x-2y=1 meet at the point P. Then the area (in unit2) of the triangle PAB is:
HARD
JEE Main
IMPORTANT
Let the function fx=2x2-logex,x>0, be decreasing in 0,a and increasing in a,4. A tangent to the parabola y2=4ax at a point P on it passes through the point 8a, 8a-1 but does not pass through the point -1a,0. If the equation of the normal at P is xα+yβ=1, then α+β is equal to