\(\left( C \right):\,\,{{x}^{2}}+{{y}^{2}}-4x-2y+1...

Câu hỏi: \(\left( C \right):\,\,{{x}^{2}}+{{y}^{2}}-4x-2y+1=0;\,\,\overrightarrow{u}=\left( 1;3 \right)\). \({{T}_{\overrightarrow{u}}}:\,\,\left( C \right)\mapsto \left( C' \right).\). Phương trình \(\left( C' \right)\) là:

A \({{\left( x-3 \right)}^{2}}+{{\left( y-4 \right)}^{2}}=2\)                        

B  \({{\left( x-3 \right)}^{2}}+{{\left( y-4 \right)}^{2}}=4\)

C  \({{\left( x+3 \right)}^{2}}+{{\left( y+4 \right)}^{2}}=4\)                         

D \({{\left( x+3 \right)}^{2}}+{{\left( y-4 \right)}^{2}}=4\)