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The focal chord of the parabola (y-2)^...

The focal chord of the parabola `(y-2)^2=16(x-1)` is a tangent to the circle `x^2+y^2-14 x-4y+51=0,` then slope of the focal chord can be (1) 0 (2) 1 (3) 2 (4) 3

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