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If the family of parabolas touch the pair of lines xy-2x-cy+2=0(c is constant) with axis parallel to the line x+2y+k=0, then its focus lies on the line?

If the family of parabolas touch the pair of lines xy-2x-cy+2=0(c is constant) with axis parallel to the line x+2y+k=0, then its focus lies on the line?

Grade:12th pass

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