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[" 3.If the circle "x^(2)+y^(2)+2x+2ky+6...

[" 3.If the circle "x^(2)+y^(2)+2x+2ky+6=0" and "x^(2)+y^(2)+2ky],[+k=0" intersect orthogonally,then "k" is "],[[" a."2," b."-2," c."-(3)/(2)," d."(3)/(2)]]

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