If `a^2+4b^2-9c^2= 4ab`, then the line on which the point of concurrency of family of straight line `ax + by + 3c = 0` lies is (a) x+y=-1 (c) x +y 3 (b) x+y=1 (d) 2x+y=0

If a^(2)+4b^(2)-9c^(2)=4ab , then the line on which is meet the point of concurrency of family of straight line ax+by+3c=0 lies is

If a^2+b^2-c^2-2ab , then the point of concurrency of family of straight lines ax+by+c=0 lies on line

If a,b,c are in Hp. (a,b,c!=0 point of concurrence of family of lines x/a+y/b+1/c=0 is

If a^2+b^2-c^2-2ab = 0 , then the family of straight lines ax + by + c = 0 is concurrent at the points

If the pair of straight lines xy - x - y + 1 = 0 and the line ax+2y-3 = 0 are concurrent then a=

The equation of a straight line passing through the point (2, 3) and inclined at an angle of tan^(-1)(1/2) with the line y+2x=5 is: (a) y=3 (b) x=2 (c) 3x+4y-18=0 (d) 4x+3y-17=0

If the pair of straight lines xy - x - y +1=0 & the line ax+2y-3=0 are concurrent then a =

Find the equation of the tangent line to the curve y=(3x^2-1)/x at the point (1,2) is (a) 4x-y-1=0 (b) 4x+y+2=0 (c)x-y-1=0 (d) 4x-y-2=0

y-1=m_1(x-3) and y - 3 = m_2(x - 1) are two family of straight lines, at right angled to each other. The locus of their point of intersection is: (A) x^2 + y^2 - 2x - 6y + 10 = 0 (B) x^2 + y^2 - 4x - 4y +6 = 0 (C) x^2 + y^2 - 2x - 6y + 6 = 0 (D) x^2 + y^2 - 4x - by - 6 = 0

If the pair of straight lines xy-x-y+1=0 & the line ax+2y-3=0 are concurrent then a=