n^2/2n^2+1怎么化简成 1/2-1/2（2n^2+1）_数学解答

n^2/2n^2+1怎么化简成 1/2-1/2（2n^2+1）

人气：212 ℃　时间：2020-04-09 06:14:04

解答

=(n^2+1/2-1/2)/[2(n^2+1/2)]
=(n^2+1/2)/[2(n^2+1/2)]-(1/2)/[2(n^2+1/2)]
=1/2-(1/2)*1/(2n^2+1)
=1/2-1/[2(2n^2+1)]