Q.

A circle is described on the line joining the points  (2,−3)  and  (−4,7)  as a diameter

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a

passes through the origin

b

touches the axis of x.

c

touches the axis of y

d

origin lies inside the circle

answer is D.

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Detailed Solution

Equation of the circle is  (x−2)(x+4)+(y+3)(y−7)=0⇒x2+y2+2x−4y−29=0Centre is (1, – 2), radius   =34Distance of the centre from the origin is 5<34
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