Question 1090723
{{{y=x-7}}}
Interchange x and y and solve for y.
{{{x=y-7}}}
{{{y=x+7}}}
{{{f^(-1)=x+7}}}
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*[illustration 239.JPG].
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{{{y=x^2+1}}}
Interchange x and y and solve for y.
{{{x=y^2+1}}}
{{{y^2=x-1}}}
{{{y= 0 +- sqrt(x-1)}}}
{{{f^(-1)=0 +- sqrt(x-1)}}}
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*[illustration 240.JPG].