中考能力型试题专项训练圆与方程综合

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1、能力型试题专项训练试题专项训练代数几何综合题1．圆与方程综合例1.如图，,PB=PM求证：(1).是等边三角形(2).PA,PB是关于x的方程的两根例2..在中,AB=,AC=6,BC=,P是AC上与A、C不重合的一动点，过P、B、C的圆O交AB于D(1).设,求y与x的函数关系式，并确定x的取值范围(2).P在AC上何处时y有最小值？最小值是多少？(3).求y取最小值时圆O的面积例3．如图，两同心圆，大圆的弦AD交小圆于B、C,AE切小圆于E,连接CE,直线BE交大圆于P、Q.已知BE=AE,AB=a,AE=b.(1).求证：CD、CE的长是方程的两根(2).求PB的长3例4

2、.如图，以RtABC的直角顶点C为原点，以两条直角边AC.AB为x轴、y轴建立直角坐标系，圆O是ABC的内切圆，半径为r.两条直角边a、b是一元二次方程的两根。AB=c(1).确定c与r的关系，c与m的关系(2).当圆O面积为4时，求c和m的值(3).求在(2)的条件下直线EF的解析式内部资料，请勿外传！9JWKffwvG#tYM*Jg&6a*CZ7H$dq8KqqfHVZFedswSyXTy#&QA9wkxFyeQ^!djs#XuyUP2kNXpRWXmA&UE9aQ@Gn8xp$R#͑Gx^Gjqv^$UE9wEwZ#Qc@UE%&qYp@Eh5pDx2zVkum&

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