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Question

The equation of the circle which passes through the points (1,0),(0,−6) and (3,4) is

A
4x2+4y2+142x+47y+140=0
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B
4x2+4y2142x47y+138=0
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C
4x2+4y2142x+47y+138=0
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D
4x2+4y2+150x49y+138=0
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Solution

The correct option is C 4x2+4y2142x+47y+138=0

The general fromula of circle is

x2+y2+Dx+Ey+F=0

Putting (1,0);1+0+D+0+F=0

(0,6);0+36+0+E+F=0

(3,4);9+16+3D+4E+F=0

Solving the above equatio we get

D=1424E=474F=1384

Putting these value we get equation of circle

4x2+4y2142x+47y+138=0

So correct answer will be option C



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