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If 3x + y + k = 0 is a tangent to the ci...

If `3x + y + k = 0` is a tangent to the circle `x^(2) + y^(2) = 10`, the values of k are,

A

`pm 7`

B

`pm 5`

C

`pm 10`

D

`pm 9`

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The correct Answer is:
C
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