解析几何是历年高考经久不衰的热点和难点,学生经常会遇到思路正确但因运算过程繁杂,而使解题半途而废的情况.因此,在解答解析几何题的过程中,如何减少计算量成为迅速、正确解题的关键.本文介绍解析几何中的几种特殊方法,以期有助于学生的高考复习.一、利用曲线系例1已知O为坐标原点,F为椭圆C:x~2+(y~2)/2=1在y轴正半轴上的焦点,过F且斜率为-2~(1/2)的直 Analytic geometry is the hot and difficult enduring college entrance examination over the years, students often encounter the right ideas but because of the complex process, and make the problem halfway through the situation.Therefore, in the process of solving the analytical geometry problem, how to reduce the amount of computing become Quickly and correctly solve the problem.This article describes several special methods in analytical geometry, in order to help students review the college entrance examination. First, the use of curve system example 1 is known as the origin of coordinates, F is the ellipse C: x ~ 2 + (y ~ 2) / 2 = 1 The focal point on the positive semi-axis of the y-axis passes through F with a slope of -2 to (1/2)