过第一、二、四、象限
则3-k<0且2k+1>0
所以k>3,k>-1/2
所以k>3
已知一次函数y=(3-k)x+2k+1.如果它的图像绝过第一、二、四、象限,求k的取值范围
已知一次函数y=(3-k)x+2k+1.如果它的图像绝过第一、二、四、象限,求k的取值范围
数学人气:412 ℃时间:2019-11-22 16:27:34
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