Replace f(x)f(x) with yy.y=x2−1y=x2-1
Interchange the variables.x=y2−1x=y2-1
Solve for yy.
y=√1+x,−√1+xy=1+x,-1+x
Solve for yy and replace with f−1(x)f-1(x).
This is your answer=f−1(x)=√1+x,−√1+xf-1(x)=1+x,-1+x
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