The domain of a function is the set of all possible inputs for the function. For example, the domain of f (x)=x² is all real numbers, and the domain of g (x)=1/x is all real numbers except for x=0.

The domain needs to be restricted to avoid any input (X-value) that would cause the denominator to be = 0. We do this by looking at each factor in the denominator and finding the value that …

The domain of a function, you'll often hear it combined with domain and range. But the domain of a function is just what values can I put into a function and get a valid output.

Now the domain is the set of all x values that if we input it into this function, we're going to get a legitimate output. We're going to get a legitimate f of x.

Learn about the domain and range of a function on Khan Academy.

The domain is the possible numbers n can be that would accurately describe the sequence. For example, the difference between whether n>=1 or n>=0 depends on whether the range …

Learn about rational functions with Khan Academy's comprehensive tutorials and interactive exercises designed to enhance your understanding of Algebra 2 concepts.

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Determine the domain of a function according to the algebraic limitations of that function.

Let's take a look at an example where plotting a graph can help us figure out the domain and range of a function. Even if that function is not a polynomial. We break down the definition of …