The lines \( 3 x-4 y+4=0 \) and \( 6 x-8 y-7=0 \) are tangents to the same circle. Then, its rad...

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The lines \( 3 x-4 y+4=0 \) and \( 6 x-8 y-7=0 \) are tangents to the same circle. Then, its radius, is
(A) \( 1 / 4 \)
(B) \( 1 / 2 \)
(C) \( 3 / 4 \)
(D) none of these
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