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If the circles x^(2)+y^(2)=9andx^(2)+y^(...

If the circles `x^(2)+y^(2)=9andx^(2)+y^(2)+2alphax+2y+1=0` touch each other internally , then `alpha`=

A

`1`

B

`4 (4)/(3)`

C

`-(4)/(3)`

D

`(4)/(3)`

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The correct Answer is:
D
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