The circles x^2+y^2-2x-4y+1=0 and x^2+y^...

The circles `x^2+y^2-2x-4y+1=0` and `x^2+y^2+4x+4y-1=0` (a)touch internally (b)touch externally (c)have `3x+4y-1=0` as the common tangent at the point of contact have `3x+4y+1=0` (d)as the common tangent at the point of contact

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The circles x^2+y^2-2x-4y+1=0 and x^2+y^2+4x+4y-1=0 ............a)touch internally b)touch externally c)have 3x+4y-1=0 as the common tangent at the point of contact d)have 3x+4y+1=0 as the common tangent at the point of contact

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