As shown in the figure, AB and CD are tw...

As shown in the figure, AB and CD are two common tangents to circles with centres `O_(1) and O_(2)` and different radius. Prove that AB=CD

`3rho_(3)=2rho_(1)+rho_(2)`

`rho_(3)=2rho_(1)+3rho_(2)`

`2rho_(3)=3rho_(1)+rho_(2)`

`rho_(3)=3rho_(1)+2rho_(2)`

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