The number of common tangents to the circles \[{{x}^{2}}+{{y}^{2}}=1\]and \[{{x}^{2}}+{{y}^{2}}-4x+3=0\] is [DCE 2005]

The number of common tangents to the circles \[{{x}^{2}}+{{y}^{2}}=1\]

1.	The number of common tangents to the circles \[{{x}^{2}}+{{y}^{2}}=1\]and \[{{x}^{2}}+{{y}^{2}}-4x+3=0\] is [DCE 2005]
A.	1
B.	2
C.	3
D.	4
Answer» D. 4

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The number of common tangents to the circles \[{{x}^{2}}+{{y}^{2}}=1\]and \[{{x}^{2}}+{{y}^{2}}-4x+3=0\] is [DCE 2005]

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