What is the domain of #f(x)=3x+4#?
It's all real numbers.
The domain of any function is simply all the possible numbers you can input for
In the given function
For example, consider the function below:
In this function, you can input every number except one number: zero. This is because it is against the rules of math to divide by zero. Hence, the domain of this function would be all reals except zero, or all non-zero numbers.
Similarly, in a square root function such as
Hope that helps :)