A straight line moves such that the algebraic sum of the perpendicular drawn to it from two fixed points is equal to . Then , the straight line always touches a fixed circle of radius |
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a) |
b) |
c) |
d) |
None of these |

A straight line moves such that the algebraic sum of the perpendicular drawn to it from two fixed points is equal to . Then , the straight line always touches a fixed circle of radius |
|||||||

a) |
b) |
c) |
d) |
None of these |

1 Answer

127 votes

**(c)**

Let the coordinates and and let the straight line be . Then,

So, the straight line is

Clearly, it touches the circle of radius

127 votes

127