Question

y=x^5-5x^4+10x^3-10x^2+5x的反函数

Answer 1

y=x^5-5x^4+10x^3-10x^2+5x

=x^5-5x^4+10x^3-10x^2+5x+1-1

=(x-1)^5-1

=>y-1=(x-1)^5

=>(y-1)^(1/5)=x-1

=>(y-1)^(1/5)+1=x

反函数：

y=(x-1)^(1/5)+1