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二次函数y=ax2+bx+c(a≠0)是中学数学中的一种重要的函数类型,灵活应用二次函数的图像和性质,可解决一些不等式的证明问题.
The quadratic function y=ax2+bx+c(a≠0) is an important type of function in middle school mathematics. The image and properties of the quadratic function can be flexibly used to solve some inequalities.