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Tangents are drawn to circle x^(2)+y^(2)...

Tangents are drawn to circle `x^(2)+y^(2)=1` at its iontersection points (distinct) with the circle `x^(2)+y^(2)+(lambda-3)x+(2lambda+2)y+2=0`. The locus of intersection of tangents is a straight line, then the slope of that straight line is .

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