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If x + y+ k =0 touches the circle x ^(2)...

If `x + y+ k =0` touches the circle `x ^(2) + y^(2) -2x -4y + 3 =0,` then k can be

A

`-1,5`

B

`1,-5`

C

`1,5`

D

`-1,-5`

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The correct Answer is:
D
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TARGET PUBLICATION-CIRCLE AND CONICS -COMPETITIVE THINKING
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