1.the equation of the perpendicular bisector of the segment joining the points whose coordinates are (1.4)and (-2.3) is 2.if the graph of πx+根号2y+根号3=0 is perpendicular to the graph of ax+3y+2=0 ,the a=
问题描述：
1.the equation of the perpendicular bisector of the segment joining the points whose coordinates are (1.4)and (-2.3) is
2.if the graph of πx+根号2y+根号3=0 is perpendicular to the graph of ax+3y+2=0 ,the a=
答
jushbb
625
660
266
答
这两题都考一个知识点：两个一次函数图象互相垂直,k1*k2=-1
因此第一题可以知道垂直平分线的斜率 代入中点坐标即可
第二题把两个方程转化成y=kx+b的形式 算出a的值