# The x-coordinates of the points A and B are the roots of the equation y2-2y-3=0. The raius of the circle on AB as diameter is

1.  √17

2.  √17/2

3.  √17/4

4.  √29/2

4

√17/2

Explanation :
No Explanation available for this question

# The distance between two parallel chords each of length 10 units is 24 units. Then the radius of the circle is

1.  30

2.  13

3.  12

4.  5

4

13

Explanation :
No Explanation available for this question

# If α,β,γ are the roots of the equation 2x3-2x-1=0 then

1.  -1

2.  1

3.  2

4.  3

4

1

Explanation :
No Explanation available for this question

# The locus of the centre of the circles which touch the lines 6x – 8y + 5=0 and 6x – 8y + 13=0 is 6x – 8y+k=0 then k is

1.  9

2.  18

3.  12

4.  10

4

9

Explanation :
No Explanation available for this question

# If 1,2,3 and 4 are roots of the equation x4+ax3+bx2+cx+d=0,then a+2b+c=

1.  -25

2.  0

3.  10

4.  24

4

10

Explanation :
No Explanation available for this question

# If sum of the roots of the equation 2x9-11x7+6x4+8=0 is ‘a’ then ‘a’=

1.  11/2

2.  -11/2

3.  0

4.  2/11

4

0

Explanation :
No Explanation available for this question

# The radius of the circle which touches y-axis at (0, 0) and passes through the point (b, c) is:

1.  |b|/2(b2+c2 )

2.  (b2+c2)/2

3.  (b2+c2)/|2c|

4.  (b2+c2)/|2b|

4

(b2+c2)/|2b|

Explanation :
No Explanation available for this question

# The centre of the circle whose centre is on the straight line 5x – 2y +1=0 and cuts the x-axis at two points whose abscissa are -5 and 3 is

1.  (1, 3)

2.  (-1 -2)

3.  (1/5, 1)

4.  (-9/5 , 4)

4

(-1 -2)

Explanation :
No Explanation available for this question

# If α,β and 1 are the roots of x3-2x2-5x+6=0 then (α,β)=

1.  (3,2)

2.  (3,-2)

3.  (-3,-2)

4.  (-3,2)

4

(3,-2)

Explanation :
No Explanation available for this question

1.  x + y=5

2.  2x + 2y=5

3.  2(x – y)=5

4.  x +y=1

4