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一个函数与其自身对称和两个函数的互相对称是不同的。受一个函数与其自身对称的影响,在判定两个函数互相对称时,有时出现错判定,现举两例。例1 判定函数y=f(2+x)与y=f(2—x)的位置关系。
A function is symmetric with itself and the symmetries of the two functions are different. Due to the influence of a function and its own symmetry, when it is determined that two functions are symmetric to each other, an error determination sometimes occurs. Two examples are now given. Example 1 determines the positional relationship of the function y=f(2+x) and y=f(2-x).