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[" If "n-1C(r)=(K^(2)-3)^(n)C(r+1)" ,the...

[" If "n-1C_(r)=(K^(2)-3)^(n)C_(r+1)" ,then "K" belongs to "],[[" (1) "[-sqrt(3),sqrt(3)]," (2) "(-oo,-2)],[" (3) "(2,oo)," (4) "(sqrt(3),2]]]

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