A is (2,5) and B is (-1,3).write out the slope of AB and the equation of the line AB.write out the equation of the line through B perpendicular to AB
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解答
问:A是,B是.写出直线AB斜率和方程.写出过B点与AB垂直的直线方程.
斜率=(5-3)/(2-(-1))=2/3
AB:y=2/3x+11/3
直线:y=-3/2x+3/2
鉴定完毕
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