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直线与圆位置关系是高考解析几何的重要考点.而直线与圆中的最值问题,又是高考考查的核心考点之一,常以选择题填空题居多,难度不大,但经常和其他知识结合考查.本文就破解最值问题的几种策略加以总结,以期能对同学们的学习有所启发和帮助.1.套用基本公式例1圆x~2+y~2-2x-2y+1=0上的点到直线x-y=2的距离的最大值是____.
Linear and circular relationship between the location of the college entrance examination analytic geometry is an important test site.The straight line and the circle of the most valuable questions, but also the core of the college entrance examination test sites, often with multiple choice questions blank, mostly difficult, but often and other knowledge Combined with test.This paper summarizes several strategies to solve the most value problems, with a view to be able to inspire and help students learn.1.Application of the basic formula Example 1 circle x ~ 2 + y ~ 2-2x-2y +1 The maximum value of the distance from point 0 to line xy = 2 is ____.