由于函数概念不清 ,导致在处理函数图象变换的问题中出现错误 ,下面列举学生在练习中几种常见错误 ,关剖析错因 .错误 1　函数 ｙ =ｆ( -ｘ +ａ)的图象是函数 ｙ=ｆ( -ｘ)的图象沿ｘ轴右移 (ａ 0 )或左移 (ａ 0 )|ａ|个单位而得到 .剖析　函数图象的左右平移的根据是自变量ｘ Because the concept of the function is unclear, it causes errors in the processing of image transformation of the function. Here are some common mistakes students make in the exercises. Check out the causes of errors. Error 1 Image of the function y =f( -x +a) The image whose function y=f(-x) is shifted to the right by the x axis (a 0) or by the left (a 0 )|a| units. The basis for the left and right translation of the image of the analysis function is the independent variable x.