Yes, although functions that do so are not one-to-one functions. A vertical parabola is an example of one such function.
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Yes. If you have a function that squares a number, the output will be the same for both positive and negative input of the number. e.g. 22 = (-2)2 Or if you use a boolean: If test > 0 return True test can be equal to 1 or 2 or anything else
That set is called the ranger of the function.
output
It prevents certain types of inconsistent data values from being entered.It assign a row(s) nullable values.It assign a column(s) duplicate data values from being entered.None of above
The domain is the possible values that can be input into the function and produce a real number output.