直线与圆考点突破练11-.docx

考点突破练11直线与圆一、必备知识夯实练1.(2023浙江温州三模)已知直线l1:x+y=0,l2:ax+by+1=0,若l1⊥l2,则a+b=()A.-1B.0C.1D.22.(2023河北...