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PQ is a direct common tangent of two cir...

PQ is a direct common tangent of two circles of radii `r_(1) and r_(2)` touching each other externally at A. Then the value of `PQ^(2)` is :

A

`r_(1) r_(2)`

B

`2r_(1) r_(2)`

C

`3r_(1) r_(2)`

D

`4 r_(1) r_(2)`

Text Solution

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The correct Answer is:
D
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