# The focus and directrix of a parabola are (1,2) and 2x-3y+1=0.Then the equation of the tangent at the vertex is

1.  4x-6y+7=0

2.  4x-6y+11=0

3.  4x-6y+9=0

4.  4x-6y+5=0

4

4x-6y+5=0

Explanation :
No Explanation available for this question

# AB is a focal chord of the parabola y2=4ax.If A=(4a,4a) then B=

1.  (a/4,-4a)

2.  (a/2,-a/2)

3.  (a/4,-a)

4.  (a/2,-a/4)

4

(a/4,-a)

Explanation :
No Explanation available for this question

# If (9,12) is one end of a focal chord of the parabola y2=16x then the slope of the chord is

1.  3/7

2.  12/5

3.  7/3

4.  5/12

4

12/5

Explanation :
No Explanation available for this question

# The focus and directrix of a parabola are (0,0) and y=2x+1.The equation of its axis is

1.  x+2y-7=0

2.  x+2y=5

3.  x+2y=0

4.  2x-y=0

4

x+2y=0

Explanation :
No Explanation available for this question

# The parabola x2=py passes through (12,16).Then the focal length of the point is

1.  18

2.  13

3.  73/4

4.  57/4

4

73/4

Explanation :
No Explanation available for this question

# If the parabola y2=-4ax passes through (-3,2) then the length of its latusrectum is

1.  4

2.  4/3

3.  1/3

4.  2/3

4

4/3

Explanation :
No Explanation available for this question

# Focus of the parabola 4y2-20x-8y+39=0 is

1.  (6,1)

2.  (3,1)

3.  (4,1)

4.  (5,1)

4

(3,1)

Explanation :
No Explanation available for this question

# The angle subtended by the double double ordinate of length 16 of the parabola y2=8x at its vertex is

1.  π/2

2.  π/3

3.  π/4

4.  π/6

4

π/2

Explanation :
No Explanation available for this question

# Equation of the latusrectum of the parabola x2+8x+12y+4=0 is

1.  y+5=0

2.  y+1=0

3.  y+2=0

4.  y+3=0

4

y+2=0

Explanation :
No Explanation available for this question

1.  6

2.  2

3.  1/3

4.  3/2

4