# If the ratio of the roots of ax2+bx+c=0 is same as that of the roots of px2+qx+r=0,then a/p,b/q,c/r are in

1.  A.P

2.  G.P

3.  H.P

4.  none

4

G.P

Explanation :
No Explanation available for this question

# the equation of the parabola whose vertex and focus are on x – axis at distance a and a’ respectively from the orgin is

1.  Y2 = 4 (a2 + a) (x – a)

2.  Y2 = 4 (a’- a) (x –a )

3.  Y2= (a’ + a)(x + a)

4.  Y2 = 4 (a’- a) (x – a)

4

Y2 = 4 (a’- a) (x – a)

Explanation :
No Explanation available for this question

# The value of m for which one of the roots of x2-3x+2m=0 is double of one of the roots of x2-x+m=0 is

1.  1

2.  -2

3.  2

4.  none

4

-2

Explanation :
No Explanation available for this question

# the equation of the parabola whose axis is parallel to x –axis and passing through (- 2,1), (1,2), (-1,3) is

1.  5y2 + 2x – 21y + 20 = 0

2.  15y2 + 12x – 11y + 10 = 0

3.  18y2 – 12x + 21y + 56 = 0

4.  25y2 – 2x -65y + 120 = 0

4

5y2 + 2x – 21y + 20 = 0

Explanation :
No Explanation available for this question

# The equation of the parabola whose axis is parallel to y –axis and passing through (4, 5) (-2, 11), (-4, 21) is

1.  X2 -4x -2y + 10 = 0

2.  X2 – 2x –y +5 = 0

3.  X2 - 4x – 2y + 10 = 0

4.  Y2 – 2x – 3y + 4 = 0

4

X2 -4x -2y + 10 = 0

Explanation :
No Explanation available for this question

# If the difference of the roots of x2-bx+c=0 is equal to the difference of the roots of x2-cx+b=0 and b≠c,then b+c=

1.  -1

2.  -2

3.  -3

4.  -4

4

-4

Explanation :
No Explanation available for this question

# The condition that the roots of the equation ax2+bx+c=0 may differ by 5 is

1.  b2-252=4ac

2.  b3-5a2=4ac

3.  b2+15a2=4ac

4.  none

4

b2-252=4ac

Explanation :
No Explanation available for this question

# If 2-cos3 θ=3 sin θ cos θ then θ=

1.  nπ +π/3: n ε Z

2.  nπ + tan-1(1/2): n ε Z or nπ+π/4: n ε Z

3.  nπ + (-1)nπ/6: n ε Z

4.  nπ + tan-1(3/2): n εZ or nπ+ tan-1(1/4): n ε Z

4

nπ + tan-1(1/2): n ε Z or nπ+π/4: n ε Z

Explanation :
No Explanation available for this question

# The condition that sin,cos may be the

1.  a(a+2b)=c2

2.  a(a+2c)=b2

3.  b(b+2c)=a2

4.  b(b+2a)=c2

4

a(a+2c)=b2

Explanation :
No Explanation available for this question

1.  12/25

2.  -12/25

3.  -24/25

4.  4/5

4