Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AP EAMCET20227 Jul 2022Morning ShiftMathematicsParabolaActual

For the parabola represented in the parameteric form by x=t^2+t+1 and y=t^2-t+1 , the length of latus rectum is

Options

  1. A2
  2. B3
  3. C1 / 2
  4. D8

Correct answer

A. 2

Step-by-step solution

Given, aligned & x=t^2+t+1 & y=t^2-t+1 x+y=2 (t^2+1 ) aligned and (x-y)=2 t ...(i) t= x-y 2 ...(ii) From Eqs. (i) and (ii), x+y=2 [ (x-y)^2 4 +1 ] array ll & 2(x+y)=(x-y)^2+4 & (x-y)^2=2(x+y-2) array Y^2=2 X where, Y=x-y and X=x+y-2 Length of latus rectum =2

Practice Parabola on Quantrex Academy →

More from Parabola

A parabola has its focus on the positive X-axis and the Y-axis as its directrix. If P( , 4) is a point on this parabola such that the tangent to the parabola at point P passes thro 2026The distance of the focus of the parabola y^2 = 16x from its directrix is... 2026The area of the triangle formed by the lines joining the vertex of the parabola x^2 = 48y to the ends of its latus rectum, is ..... 2026A point on the parabola y^2 = 36 5 x at which the ordinate increases at thrice the rate of the abscissa is ..... 2026A circle is drawn with its centre at the focus of the parabola y^2=2 p x such that it touches the directrix of the parabola. Then a point of intersection of the circle and the para 2025If the locus of a point that divides a chord of slope 2 of the parabola y^2=4 x internally in the ratio 1: 2 is a parabola, then its vertex is 2025If x-y-3=0 is a normal drawn through the point (5,2) to the parabola y^2=4 x , then the slope of the other normal that can be drawn through the same point to the parabola y^2=4 x i 2025If the normal chord draw n at the point ( 15 2 , 15 2 ) to the parabola y ^2=15 x subtends an angle at the vertex of the parabola, then 3 + 2 3 - 4 3 = 2025 Full Parabola list All AP EAMCET PYQs