Locus of the centre of the circle which touches x=-axis and cuts off an intercept of length 2l on y-axis is

1.  x2+y2=l2

2.  x2-y2=l2

3.  y2-x2=l2

4.  x+y = 2l

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4
Correct Answer :

y2-x2=l2


Explanation :
No Explanation available for this question

If a∈Z and the equation(x-a)(x-10)+1=0 has integral roos,then the values ‘a’ are

1.  10,8

2.  12,10

3.  12,8

4.  10,12

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4
Correct Answer :

12,8


Explanation :
No Explanation available for this question

If α,β are the roots of 3x2+5x-7=0,then the value of (1/3α+5)2+(1/3β+5)2 is

1.  67/63

2.  67/441

3.  109/441

4.  19/441

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4
Correct Answer :

67/441


Explanation :
No Explanation available for this question

A(1,2),B(7,-3) C moves on L=x+3y-18=0.Locus of centroid of ΔABC is a

1.  a line parallel to L

2.  perpendicular to line L

3.  not a line

4.  L = 0

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4
Correct Answer :

L = 0


Explanation :
No Explanation available for this question

The upper three-fourth of a ship’s mast subtends,at a point on the deck which is 40 meters from the mast,an angle tan-1(3/4).The height of the mast above the deck,in meters is

1.  40

2.  80

3.  120

4.  160

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4
Correct Answer :

80


Explanation :
No Explanation available for this question

If

1.  3,√7

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

Number of normals drawn through (9,-6) to y2=4x

1.  0

2.  1

3.  2

4.  3

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4
Correct Answer :

3


Explanation :
No Explanation available for this question

If sinθ,cosθ are the roots of the equation ax2+bx+c=0 then

1.  a2-b2+2ac=0

2.  a2+b2+2ac=0

3.  a-b+2ac=0

4.  a+b+2c=0

View Answer  
4
Correct Answer :

a2-b2+2ac=0


Explanation :
No Explanation available for this question

P(-2,-1),(0,-3) are limiting points of coaxal system of which L = x2+y2+5x+y+4 = 0 is a member. S=x2+y2-4x-2y-15 = 0 is orthogonal to C.Point where polar of P cuts circle S=0 is

1.  (6,-3)

2.  (-6,-3)

3.  (-6,3)

4.  (6,3)

View Answer  
4
Correct Answer :

(6,3)


Explanation :
No Explanation available for this question

If the roots of the equation 12x2+mx+5=0 are in the ratio 5:4,then ‘m’=

1.  9√3

2.  

3.  6√3

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question
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