A) 1
B) 2
C) 3
D) 4
Correct Answer: C
Solution :
Here \[{{C}_{1}}=(0,\,0){{r}_{1}}=1\] unit \[{{C}_{2}}=(2,\,0)\,\,{{r}_{2}}=1\] Clearly \[{{C}_{1}}{{C}_{2}}={{r}_{1}}+{{r}_{2}}\] \[=1+1=2\] Thus two circles touch externally, Hence the number of common tangents is 3.You need to login to perform this action.
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