# If C is very small when compared to k then (k/[k+c])1/2 + (k/[k-c])1/2=

1.  2+(c/k)

2.  2-(c/k)

3.  2+(3c2/4k2)

4.  2-(3c2/4k2)

4

2+(3c2/4k2)

Explanation :
No Explanation available for this question

# If C0+2C1+4C2+…..+2nCn=243, then n=

1.  3

2.  4

3.  5

4.  6

4

5

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/2, -a/4)

2.  (a/4, -a)

3.  (a/2, -a/2)

4.  (a/4, -4a)

4

(a/4, -a)

Explanation :
No Explanation available for this question

# If the tangents to the parabola y2=4ax at (x1,y1) and (x2,y2) meet on the axis then

1.  x1=-x2

2.  x1=2x2

3.  y1=y2

4.  y1=-y2

4

y1=-y2

Explanation :
No Explanation available for this question

# If the tangents at (at12, 2at1) and (at22, 2at2) on the parabola y2=4ax intersect on the axis then

1.  t1=(2/t2)

2.  t1t2=-4

3.  t1t2=-1

4.  t1=-t2

4

t1=-t2

Explanation :
No Explanation available for this question

# If the tangents at t1,t2,t3 on y2=4ax make angles 300,450,600 with the axis then t1,t2,t3 are in

1.  A.P

2.  G.P

3.  H.P

4.  A.G.P

4

G.P

Explanation :
No Explanation available for this question

# If y1 and y2 are the ordinates of two points P and Q on a parabola and y3 is the ordinate of the point of intersection of the tangents at P and Q then

1.  y1,y2,y3 are in A.P

2.  y1,y3,y2 are in A.P

3.  y1,y2,y3 are in G.P

4.  y1,y3,y2 are in G.P

4

y1,y3,y2 are in A.P

Explanation :
No Explanation available for this question

# The tangents at (at12, 2at1) and (at22, 2at2) on the parabola y2=4ax are at right angles then

1.  t1t2=-1

2.  t1t2=1

3.  t1t2=2

4.  t1t2=-2

4

t1t2=-1

Explanation :
No Explanation available for this question

# The subtangent, ordinate of the point, and subnormal to the parabola y2=12x at (4/3, 4) are in

1.  A.P

2.  H.P

3.  G.P

4.  A.G.P

4

G.P

Explanation :
No Explanation available for this question

1.  x+2y-6=0

2.  x+2y-4=0

3.  x+2y-9=0

4.  x+2y-7=0

4