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[" 18.If the tangent of the conicy "-6=x...

[" 18.If the tangent of the conicy "-6=x^(2)" at "(2,10)" touches the circle "x^(2)+y^(2)+8x-2y=k],[" (for some foxed R) at point "(a,beta)" then "a+beta=],[[" 1) "(-6)/(17)," 2) "(6)/(17)," 3) "(4)/(17)," 4) "(10)/(17)],[" O "1]]

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