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“不等式恒成立”问题,覆盖知识点多,把不等式、函数、三角、数列、几何等有机地结合起来,方法也多种多样。纵观近几年的高考题,屡屡都会出现,对于“不等式恒成立”问题中参数取值范围的确定,学生往往思路紊乱,无从下手,得分率偏低。下面结合近几年的高考题及各地中的模拟试题,
The “inequalities are always established” problem covers many knowledge points and combines inequalities, functions, triangles, sequences, and geometry organically. The methods are also varied. Looking at the college entrance examination questions in recent years, many times will appear. For the determination of the range of parameters in the problem of “inequalities and constant establishment”, students often have disordered ideas and have no way to start. The score rate is low. The following combination of college entrance examination questions in recent years and simulation questions in various places,