Question

determine whether the function has an inverse:
f(x)={2x, x<=0
{x^2, X > 0

Answer 1

A function has an inverse if you can find a function from the output set to the input set. So if two inputs lead to the same output, you're not going to have an inverse function. Does \(f(x)\) satisfy these conditions?

Answer 2

does it pass the vertical line test ?