已知y1=-4x-2,y2=3x-1 (1)当x 时y1y2

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已知y1=-4x-2,y2=3x-1(1)当x时y1y2已知y1=-4x-2,y2=3x-1(1)当x时y1y2已知y1=-4x-2,y2=3x-1(1)当x时y1y2(1)x>-1/7(2)x=-1

已知y1=-4x-2,y2=3x-1 (1)当x 时y1y2
已知y1=-4x-2,y2=3x-1 (1)当x 时y1y2

已知y1=-4x-2,y2=3x-1 (1)当x 时y1y2
(1)x>-1/7
(2) x=-1/7
(3) x