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
答
f﹙a+1﹚=a+1+1/(a+1) =(a^2+2a+2)/(a+1)
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)