1.

The circles `x^(2)+y^(2)-2x-4y+1=0` and `x^(2)+y^(2)+4y-1 =0`A. `(1)/(a^(2))=(1)/(b^(2))+(1)/(c^(2))`B. `(1)/(b^(2))=(1)/(c^(2))+(1)/(a^(2))`C. `(1)/(c^(2))=(1)/(a^(2))+(1)/(b^(2))`D. None of these

Answer» Correct Answer - C


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