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Range of volues of m for which the st. l...

Range of volues of m for which the st. line `y=mx+2` cuts the circle `x^(2)+y^(2)=1` in distinct or coincident points is:

A

`[-sqrt(3), sqrt(3)]`

B

`[sqrt(3),oo)`

C

`(-oo, -sqrt(3)] cup[sqrt(3),oo)`

D

None of these.

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The correct Answer is:
C
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