Find the equation of the director circle of a circle x^2 + y^2 =100. - Mathematics and Statistics

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Find the equation of the director circle of a circle ` x^2 + y^2 =100.`

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Solution

Given circle is

`x^2 + y^2= 100`

`therefore a^2 =100`

`a =10`


therefore Equation of director circle is

`x^2 +y^2 =2a^2`

`therefore x^2 + y^2 =200`

  Is there an error in this question or solution?
2012-2013 (March)

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