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不定因素越多,就会导致解题过程越复杂.怎样减少不定因素呢?我们从以下几个方面来分析.一、尽量减少动点的个数在运动的过程中,点的位置及其所满足的性质在随时发生变化.动点越多,则不定因素就越多,问题就越复杂,故解题过程中要尽可能地减少动点的个数.例1设点P是直线3x+4y+3=0上的动点,过P向圆C:(x-1)2+(y-1)2=1作切线PA,PB,其中A,B为切点.求
The more uncertain factors, will lead to more complex problem-solving process.How to reduce the indefinable factor? We analyze from the following aspects: First, try to reduce the number of moving points In the process of movement, the location and location of the point Satisfaction of the nature changes at any time.Move the more moving points, then the more uncertainties, the more complex the problem, so the process of solving problems to reduce the number of moving points as possible.Example 1 set point P is a straight line 3x + 4y + 3 = 0 on the moving point, over the P to the circle C: (x-1) 2+ (y-1) 2 = 1 tangent for the PA, PB, where A, B for the tangent point.