# (l1,m1,n1) and (l2,m2,n2) are D’rs of two lines inclined at an angle 1200 then D.C’s of the line bisecting the angle between them are

1.  (l1+l2,m1+m2,n1+n2)

2.  (l1+l2/3, m1+m2/3,n1+n2/3)

3.  (l1+l2/√2, m1+m2/√2,n1+n2/√2)

4.  (l1+l2/√3, m1+m2/√3,n1+n2/√3)

4

(l1+l2,m1+m2,n1+n2)

Explanation :
No Explanation available for this question

# If the difference of the squares of equation x2-6x+q=0 is 24,then the value of q is

1.  -7

2.  8

3.  5

4.  4

4

5

Explanation :
No Explanation available for this question

# If pr=2(q+s) then among the equations x2+px+q=0 and x2+rx+s=0 have

1.  both have real roots

2.  both have imaginary roots

3.  at least one has real root

4.  at least one has imaginary roots

4

at least one has real root

Explanation :
No Explanation available for this question

# The harmonic mean of the roots of the equation (5+√2)x2-(4+√5)x+8+2√5)=0 is

1.  2

2.  4

3.  6

4.  8

4

4

Explanation :
No Explanation available for this question

# If a=cos(2π/7)+isin(2π/7),α=a+a2+a4,β=a3+a5+a6 then α,β are the roots of the equation

1.  x2+x+1=0

2.  x2+x+2=0

3.  x2+2x+2=0

4.  x2+2x+3=0

4

x2+x+2=0

Explanation :
No Explanation available for this question

# If a triangle is inscribe in xy = c2 then its orthocenter lies on

1.  xy=c2

2.  x2+y2=c2

3.  x2-y2=c2

4.  x2-y2=1

4

xy=c2

Explanation :
No Explanation available for this question

# If 1-p is a root of quadratic equation x2+px+(1-p)=0 then its roots are

1.  0,1

2.  -1,2

3.  0,-1

4.  -1,1

4

0,-1

Explanation :
No Explanation available for this question

# If a,b,c are in G.P,and the equations x2+2bx+c=0,dx2+2ex+f=0 have a common root if a/d,b/e,c/f are in

1.  A.P

2.  G.P

3.  H.P

4.  A.G.P

4

H.P

Explanation :
No Explanation available for this question

# The least interval value of x such that (x-5)/(x2+5x-14)>0 is

1.  -4

2.  2

3.  -6

4.  5

4

-6

Explanation :
No Explanation available for this question

1.  (3,-77)

2.  (-3,77)

3.  (2,25)

4.  (25,2)

4