1.

If a circle passes through the point (a,b) and cuts the circlex^(2) + y^(2) = k^(2) orthogonally, the equation of the locus of its centre is

Answer»

` 2ax + 2BY = a^(2) + B^(2) + K^(2)`
`AX + by = a^(2) + b^(2) + k^(2)`
`x^(2) + y^(2) + 2ax + 2by + k^(2) = 0 `
` x^(2) + y^(2) - 2ax + 2by + k^(2) = 0 `

Answer :A


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