# How do you find the domain of a cubic function?

**cubic function**f(x)=x3 f ( x ) = x 3 , the

**domain**is all real numbers because the horizontal extent of the graph is the whole real number line. The same applies to the vertical extent of the graph, so the

**domain**and

**range**include all real numbers.

Thereof, how do you find the domain of a cubic root function?

Step 1: The **domain of a cube root function** is the set of all real numbers. Step 2: Write the answer using interval notation. Step 1: The **domain of a cube root function** is the set of all real numbers. Step 2: Write the answer using interval notation.

Beside above, what is a in a cubic function? A **cubic function** is any **function** of the form y = ax^3 + bx^2 + cx + d, where a, b, c, and d are constants, and a is not equal to zero, or a **polynomial functions** with the highest exponent equal to 3. These types of **functions** are extremely prevalent in applications involving volume.

Similarly, it is asked, how do you find the domain of a function?

For this type of **function**, the **domain** is all real numbers. A **function** with a fraction with a variable in the denominator. To find the **domain** of this type of **function**, set the bottom equal to zero and exclude the x value you find when you solve the equation. A **function** with a variable inside a radical sign.

How do you know if the domain is all real numbers?

**Domain is all real numbers** except 0. Since division by 0 is undefined, (x-3) cannot be 0, and x cannot be 3. **Domain is all real numbers** except 3. Since the square root of any **number** less than 0 is undefined, (x+5) must be equal to or greater than zero.