1.

\({\left( {{\rm{x}} - 1} \right)^2} + {\left( {{\rm{y}} - 3} \right)^2} = {{\rm{r}}^2}\) and \({{\rm{x}}^2} + {{\rm{y}}^2} - 8{\rm{x}} + 2{\rm{y}} + 8 = 0\)If the circles intersect at two distinct points, then which one of the following is correct?

A. r = 1
B. 1 < r < 2
C. r = 2
D. 2 < r < 8
Answer» E.


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