急求高二数学下B人教版9.1和9.2习题答案!在线等答案!

问题描述:

急求高二数学下B人教版9.1和9.2习题答案!在线等答案!

1、C点为(x,y)则有:[(x-3)^2+(y-20)^2]^0.5=[(x-3)^2+(y-5)^2]^0.5即:(x-3)^2+(y-20)^2=(x-3)^2+(y-5)^2亦即:(y-20)^2=(y-5)^2即:y-20=y-5(舍去)或y-20=-(y-5)整理:y=12.5,且y不等于32、设圆心为O(X,Y)则有:...这个貌似不是,请再看一下问题