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

Grade:12

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