不等式“恒成立”与“恒有解”是容易混淆的问题.“f(x)>a在什么条件下在R上恒成立.”是指求对每个实数x,f(x)>a都成立的条件.用函数的观点来看,命题等价于“在什么条件下,函数y=f(x)的图像恒在直线y=a的上方.” The inequalities “constant establishment” and “constant solution” are confusing questions. “F(x)>a under what conditions is established in R.” is for each real number x, f(x)>a Conditions that are all established. From a functional point of view, the proposition is equivalent to “under what conditions, the image of the function y=f(x) is always above the line y=a.”