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对于函数与方程,主要涉及的知识点是判断一元二次方程根的存在性及根的个数;把握函数零点与方程根的关系;体会并理解函数与方程相互转化的数学思想方法.
For function and equation, the main knowledge point is to judge the existence of root and the number of root of quadratic equation; to grasp the relationship between zero point of function and root of equation; to understand and understand the mathematical method of mutual transformation of function and equation.