# If the parabola (y-2)2=p(x+1) passes through (3,6) then its directrix is

1.  4x-1=0

2.  4x+3=0

3.  4x+5=0

4.  x+2=0

4

x+2=0

Explanation :
No Explanation available for this question

# The axis of symmetry of the conic y=ax2+bx+c is

1.  y=ax

2.  b+2ax=0

3.  x=0

4.  y=0

4

b+2ax=0

Explanation :
No Explanation available for this question

# If (4,8) is one end of a focal chord of the parabola y2=16x then its equation is

1.  x-y=16

2.  x+y=12

3.  x=4

4.  y=8

4

x=4

Explanation :
No Explanation available for this question

# Focus of the parabola 4x2-12x+8y+13=0 is

1.  (3/2,-1)

2.  (3/2,-3)

3.  (3/2,-5)

4.  (3/2,-2)

4

(3/2,-1)

Explanation :
No Explanation available for this question

# A circle C of radius 2 units rolls inside the rim of the circle x2+y2+8x-2y-19=0.Then the locus of the centre of C is

1.  x2+y2-8x+2y+1=0

2.  x2+y2+8x-2y+1=0

3.  x2+y2+8x-2y-1=0

4.  x2+y2+8x-2y-47=0

4

x2+y2+8x-2y+1=0

Explanation :
No Explanation available for this question

# If the circles (x+a)2+(y+b)2=a2 ,(x+α)2+(y+β)2 =β2 cut orthogonally then a2+b2

1.  2(aα+bβ)

2.  -2(aα+bβ)

3.  α2+β2

4.  aα+bβ

4

2(aα+bβ)

Explanation :
No Explanation available for this question

# The angle between the tangents from a point on x2+y2+2x+4y-31=0 to the circle x2+y2+2x+4y-4=0 is

1.  π/3

2.  π/4

3.  π/2

4.  π/6

4

π/3

Explanation :
No Explanation available for this question

# Two equal circles with their centers on X and Y-axis will posses the radical axis in the following form

1.  2g2x+2f2y-g4-f4=0

2.  g2x+f2y-g4-f4=0

3.  2gx+2fy-g2+f2=0

4.  ax-by-(a2+b2/4)=0

4

2gx+2fy-g2+f2=0

Explanation :
No Explanation available for this question

# The radical axis of the circle x2+y2+4x-6y=12 and x2+y2+2x-2y-1=0 divides the line joining the centers of the circles in the ratio

1.  -3:7

2.  -27:17

3.  3:7

4.  27:17

4

-27:17

Explanation :
No Explanation available for this question

1.

2.  2(r2-b2+a2)

3.

4.

4