1.

A line passes through a fixed point A(a, b). The locus of the foot of the perpendicular on it from origin is

Answer»

`X^(2)+y^(2)+ax+by=0`
`x^(2)+y^(2)-ax-by=0`
`x^(2)+y^(2)-ax+by=0`
`x^(2)+y^(2)+ax-by=0`

ANSWER :2


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