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求与二次曲线相关的某些变量的取值范围是较常见而又重要的题型,是高考的热点,这类题目难度较大。灵活性强,学生感到困难.解决这类问题的关键是构造以所求变量为主元的不等式.本文谈谈怎样构造不等式求与椭圆相关的变量的取值范围,这些方法可运用到双曲线与抛物线中去.
Finding the range of values of some variables related to the quadratic curve is a more common and important question type, and it is a hot spot of the college entrance examination. Such topics are more difficult. The flexibility is so strong that students feel difficult. The key to solving this type of problem is to construct an inequality with the desired variable as the principal element. This article talks about how to construct inequalities and the range of values of variables related to ellipses. These methods can be applied to hyperbolas. Going with a parabola.