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Restrict Domain to Make Invertible Practice Test
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Q1
A student claims $f(x)=x^2$ is invertible on all real numbers because you can “solve” $y=x^2$ by writing $x=\pm\sqrt{y}$. Which domain restriction correctly fixes the issue so the inverse is a function (passes the horizontal line test)?
A student claims $f(x)=x^2$ is invertible on all real numbers because you can “solve” $y=x^2$ by writing $x=\pm\sqrt{y}$. Which domain restriction correctly fixes the issue so the inverse is a function (passes the horizontal line test)?