已知函数f(x)=e的x次方,x0,则f﹙f﹙1/e﹚﹚=?

题目

已知函数f(x)=e的x次方,x0,则f﹙f﹙1/e﹚﹚=?
f(x)是分段函数...

答案

f(x) = e^x ,x0
1/e >0
f(1/e) = ln(1/e) = -1
f(f(1/e)) = f(-1) = 1/e