is the function x²+3 surjective. how do you test for surjectivity ?

is the function x²+3 surjective. how do you test for surjectivity ?

is the function x²+3 surjective. how do you test for surjectivity ?

markosheehan said:

is the function x²+3 surjective. how do you test for surjectivity ?

Click to expand...

How does your book define a function's being "surjective"? (Please provide the full and exact formal definition. Here is an informal definition.)

How do you think you might go about testing a function against your book's definition?

Thank you!

markosheehan said:

is the function x²+3 surjective. how do you test for surjectivity ?

Click to expand...

\(\displaystyle \large \text {Does the equation }x^2+3=2\text { have any real solutions ?}\)