已知函数f﹙x﹚=x+1/x ,当a≠﹣1时,求f﹙a+1﹚的值

问题描述:

已知函数f﹙x﹚=x+1/x ,当a≠﹣1时,求f﹙a+1﹚的值

f﹙a+1﹚=a+1+1/(a+1) =(a^2+2a+2)/(a+1)