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Test: Parabola- 4 - Question 1

The straight line joining any point P on the parabola y^{2} = 4ax to the vertex and perpendicular from the focus to the tangent at P, intersect at R, then the equation of the locus of R is

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Test: Parabola- 4 - Question 2

PQ is a normal chord of the parabola y^{2} = 4ax at P, A being the vertex of the parabola. Through P a line is drawn parallel to AQ meeting the x-axis in R. Then the length of AR is

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Test: Parabola- 4 - Question 3

If the tangents and normals at the extremities of a focal chord of a parabola intersect at (x_{1}, y_{1}) and (x_{2}, y_{2}) respectively, then

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Test: Parabola- 4 - Question 4

From point P two tangents are drawn from it to the parabola y^{2} = 4x such that the slope of one tangent is three times the slope of the other. The locus of P is

Test: Parabola- 4 - Question 5

The equation of a straight line passing through the point (3, 6) and cutting the curve y = √x orthogonally is

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Test: Parabola- 4 - Question 6

The tangent and normal at P (t), for all real positive t, to the parabola y^{2} = 4ax meet the axis of the parabola in T and G respectively, then the angle at which the tangent at P to the parabola is inclined to the tangent at P to the circle through the points P, T and G is

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Test: Parabola- 4 - Question 7

AB, AC are tangents to a parabola y^{2} = 4ax. p_{1} p_{2} and p_{3} are the lengths of the perpendiculars from A, B and C respectively on any tangent to the curve, then p_{2}, p_{1}, p_{3} are in

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Test: Parabola- 4 - Question 8

Through the vertex O of the parabola, y^{2} = 4ax two chords OP and OQ are drawn and the circles on OP and OQ as diameter intersect in R. If q_{1}, q_{2} and f are the angles made with the axis by the tangent at P and Q on the parabola and by OR then the value of cotq_{1} + cotq_{2} equals

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Test: Parabola- 4 - Question 9

Let A be the vertex and L the length of the latus rectum of parabola, y^{2} – 2y – 4x – 7 = 0. The equation of the parabola with point A as vertex, 2L as the length of the latus rectum and the axis at right angles to that of the given curve is

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Test: Parabola- 4 - Question 10

Tangent to the parabola y^{2} = 4ax at point P meets the tangents at vertex A at point B and the axis of parabola at T, Q is any point on this tangent and N as the foot of perpendicular from Q on SP, where S is focus, M is the foot of perpendicular from Q on the directrix then

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Test: Parabola- 4 - Question 11

The parametric coordinates of any point on the parabola y^{2} = 4ax can be

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Test: Parabola- 4 - Question 12

The length of the chord of the parabola y^{2} = x which is bisected at the point (2, 1) is less than

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Test: Parabola- 4 - Question 13

The locus of the mid point of the focal radii of a variable point moving on the parabola, y^{2} = 4ax is a parabola whose

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Test: Parabola- 4 - Question 14

A variable circle is described to passes through the point (1, 0) and tangent to the curve y = tan(tan^{-1}x). The locus of the centre of the circle is a parabola whose

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Test: Parabola- 4 - Question 15

Two parabolas have the same focus. If their directrices are the x-axis & the y-axis respectively, then the slope of their common chord is

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