The radius of a circle, having minimum area, which touches the curve y=4−x2
and the lines, is:
As we learnt in
Standard equation of parabola -
- wherein
and concept
Perpendicular distance of a point from a line -
- wherein
is the distance from the line .
This figure shows the circle with least area satisfying the conditions.
Circle touches y=x;
Option 1)
Incorrect
Option 2)
Correct
Option 3)
Incorrect
Option 4)
Incorrect
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