If the orthocentre of the triangle formed by `2x+3y-1=0`, `ax+by-1=0` and `x+2y-1=0` is at `(0,0)` then `(a+2b)` is

Find the orthocentre of the triangle formed by x+y+10=0,x-y-2=0, 2x+y-7=0 .

The orthocentre of the triangle formed by the lines x = 0, y = 0 and x + y = 1 is

The orthocentre of the triangle formed by the lines x+3y-10 and 6x^(2)+xy-y^(2)=0 is

The orthocentre of the triangle formed by the lines xy=0 and x+y=1 is

The orthocentre of the triangle formed by the lines x-7y+6=0,2x-5y-6=0 and 7x+y-8=0 is

If the orthocentre of the triangle formed by the lines 2x + 3y -1 = 0, x +2y -1=0, ax + by -1=0 is at the origin then (a,b) is given by.

7.If the orthocentre of the triangle formed by the lines 2x+3y-10,x+2y-1-0, ax +by-1-0 is at origin then find (a,b)

Orthocentre of the triangle formed by the lines x+y=1 and x y=0 is