Straight line `Ax+By+D=0` would be tangent to `xy=c^2`, if

The condition for which the straight line ax+by+c=0 will be parallel to x - axis -

If the straight line y-2x+1=0 is the tangent to the curve xy+ax+by=0 at x=1 , then the values of a and b are respectively a) 1and 2 b) 1and -2 c) -1 and 2 d) -1 and -2

The condition for which the straight line ax +by +c=0 will pass throught the origin is -

If the line ax+by+c=0 is a tangent to the curve xy=4 then

If the line ax+by+c=0 is a tangent to the curve xy=4 then

If the line ax + by + c = 0 is a tangent to the curve xy + 4 = 0 then

If the line ax+by+c=0 is a tangent to the curve xy=9, then

If the line ax+by+c=0 is a tangent to the curve xy=9, then

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

If the line ax+by+c=0 is a tangent to the curve xy+4=0 then