C1 and C2 are circles of unit radius with centres at (0,0) and (1,0) respectively. C3 is a circle of unit radius passes through the centres of the circles C1 and C2 and have its centre above x-axis. Equation of the common tangent to C1 and C3 which does not pass through C2 is

C1 and C2 are circles of unit radius with centres at (0,0) and (1,0) r

1.	C1 and C2 are circles of unit radius with centres at (0,0) and (1,0) respectively. C3 is a circle of unit radius passes through the centres of the circles C1 and C2 and have its centre above x-axis. Equation of the common tangent to C1 and C3 which does not pass through C2 is
Answer» $C_{1} a n d C_{2}$ are circles of unit radius with centres at (0,0) and (1,0) respectively. $C_{3}$ is a circle of unit radius passes through the centres of the circles $C_{1} a n d C_{2}$ and have its centre above x-axis. Equation of the common tangent to $C_{1} a n d C_{3}$ which does not pass through $C_{2}$ is