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“不等式恒成立,求参数的取值范围”是不等式中的一大题型,不等式有千姿百态,因此常令同学们不知如何着手解决,当不等式经过变形后,不等式两边的函数图像易画出时,可借助图像来求解.
“The inequality is constant and the value range of the parameter is determined” is a big question in the inequality. The inequality has various poses. Therefore, the students often do not know how to solve it. When the inequality is deformed, the function image on both sides of the inequality is easy to draw. Can be solved by means of images.