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幂函数是人教版必修1第二章最后一节的内容,虽然放到最后,但考纲对它的要求不高.考纲对幂函数的要求是:(1)了解幂函数的概念(A级),(2)结合函数y=x,y=x~2,y=x~3,y=x~(1/2),v=x~(-1)的图象,了解它们的变化情况(A级).所以,教师对这个“鸡肋”是不太在乎的,其教学过程也就大同小异了.首先看五个生活实例,再从中提炼五个函数:p=w,s=a~2,v=a~3,a=(1/2)s,v=t~(-1).然后归纳它们的共同点:都形如y=x~α的形式,
The power function is the content of the final section of the second chapter of the compulsory part of the PEP.1 Although the test is not finalized, the requirements of the syllabus are not high. The requirements of the syllabus for the power function are: (1) to understand the concept of power function ), (2) to understand the changes of the images with the function y = x, y = x ~ 2, y = x ~ 3, y = x ~ (A level) .Therefore, the teachers do not care much about this “chicken”, and their teaching process is also similar.First, look at five life instances, and then extract five functions: p = w, s = a ~ 2, v = a ~ 3, a = (1/2) s, v = t ~ (-1) and then sum up their common ground: all the form of y = x ~