圆锥曲线是高中数学的重要内容,在每年的高考中都占有较大的比例。本文通过精选错题,详细分析错因,达到厘清易混点、规避失分点的目的。一、对定义缺乏深刻理解例1如图1,双曲线x~2/9-y~2/16=1上有一点P到左准线的距离为16/5,则P到右焦点的距离为____。错解设F_1,F_2分别为双曲线的左、右焦点, Conic is an important part of high school mathematics, occupy a large proportion of the annual college entrance examination. This article through the selection of the wrong title, a detailed analysis of the wrong reasons, to clarify the easy-mixed point, to avoid the loss of points. First, the lack of a profound understanding of the definition of Example 1 As shown in Figure 1, hyperbolic x ~ 2/9-y ~ 2/16 = 1 on a point P to the left alignment of the distance of 16/5, P to the right focus distance for____. The wrong solution set F_1, F_2 respectively hyperbolic left and right focus,