Question

Y=根号下x+1(x＞=1),求反函数?帮忙求解一下!谢谢啦!过程也写一下吧!

Answer 1

y=√(x+1)

y^2=x+1

x=y^2-1,|y|>=√2

反函数,y=x^2-1,|x|>=√2