Minimum radius of circle which is orthogonal with both the circles and is |
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a) |
4 |
b) |
3 |
c) |
d) |
1 |

Minimum radius of circle which is orthogonal with both the circles and is |
|||||||

a) |
4 |
b) |
3 |
c) |
d) |
1 |

1 Answer

127 votes

**(c)**

…(i)

…(ii)

Equation of radical axis of circles (i) and (ii) is

It intersects the line joining the centres, i.e. at the point (2, 0)

Required radius (length of tangent from (2, 0)

127 votes

127