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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

`(4)/(3)`

B

`(-4)/(3)`

C

`+-(4)/(3)`

D

1

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The correct Answer is:
C
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