x^2-x-2>=0
(x-2)(x+1)>0
x>2,x
不等式组(X^2-X-2>0) ,(2X^2+(5+2K)X+5K
不等式组(X^2-X-2>0) ,(2X^2+(5+2K)X+5K
数学人气:793 ℃时间:2020-02-02 18:55:33
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