## Meehan98 one year ago Okay, need some help, please!! Identify the inverse of f(x) = −1 + x^3. Determine whether it is a function and state its domain and range. The answer will be posted below..

1. Meehan98

$\sqrt[3]{x+1}$ is the inverse and it's a function with domain and rang being all real numbers.

2. Meehan98

I did the horizontal line test to the original function, which was instructed, and found that it was not a function, but after doing it algebraically, it is a function. Can someone tell me what I did wrong?

3. IrishBoy123

|dw:1441900050111:dw| do your tests on these?

4. IrishBoy123

|dw:1441900102084:dw|

5. Meehan98

Okay, based on the graph, they're both functions because they pass the horizontal line test.

6. Meehan98

The inverse of f(x)=x^2-4 is +- $\sqrt{x+4}$ If you graph both of those, one of them is a function while the inverse is a function.