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设m,n∈R,若直线l:mx+ny-1=0与x轴相交于点A,与y轴相交于点B,且...
设m,n∈R,若直线l:mx+ny-1=0与x轴相交于点A,与y轴相交于点B,且坐标原点O到直线l的距离为
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,则△AOB的面积S的最小值为( )
A.
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B.2
C.3
D.4
考点分析:
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