If the radius of the circle x-2 - y-2 - 18x - 12y - k - 0 be 11- then k -4-449347

The correct option is B 4(Radius)^2 = g^2 + f^2 c or 121 = 81 + 36 k or k = 4. ...

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Standard XII

Mathematics

Obtaining Centre and Radius of a Circle from General Equation of a Circle

If the radius...

Question

If the radius of the circle $x^{2} + y^{2} - 18 x + 12 y + k = 0$ be 11, then k =

347

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Solution

The correct option is C -4
$(R a d i u s)^{2} = g^{2} + f^{2}$ - c or 121 = 81 + 36 - k or k = -4.

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If the radius of the circle x2+y2−18x+12y+k=0 be 11, then k =

The correct option is C -4(Radius)2=g2+f2 - c or 121 = 81 + 36 - k or k = -4.

If the radius of the circle $x^{2} + y^{2} - 18 x + 12 y + k = 0$ be 11, then k =

The correct option is C -4
$(R a d i u s)^{2} = g^{2} + f^{2}$ - c or 121 = 81 + 36 - k or k = -4.