The circle x^2+y^2-2kx-2ky+k^2=0 touches the x-axis at P and y-axis at Q. What is PQ equal to?

NDA 2025 Mathematics question

The circle touches the -axis at and -axis at . What is equal to?

Answer: (A)

The circle is : centre and radius . It touches the

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Question ID VK-030195