Math Problem Statement

The domain for function f(x) = cubed root of x is [0, positive infinity). is this true ?

Solution

No, the domain of the function f(x)=x3f(x) = \sqrt[3]{x} is not restricted to [0,)[0, \infty). This statement is false.

The cube root function x3\sqrt[3]{x} is defined for all real numbers because any real number, whether positive, negative, or zero, has a real cube root. Therefore, the correct domain of f(x)=x3f(x) = \sqrt[3]{x} is:

Domain=(,)\text{Domain} = (-\infty, \infty)

Unlike square roots, cube roots can handle negative inputs because the cube of a negative number is also negative. For example, 83=2\sqrt[3]{-8} = -2.

Would you like more details or have any other questions?

Here are 5 related questions:

  1. What is the domain of f(x)=x4f(x) = \sqrt[4]{x}?
  2. What is the range of f(x)=x3f(x) = \sqrt[3]{x}?
  3. How do cube root and square root functions differ in terms of their domains?
  4. Can the cube root function be expressed as a power function?
  5. What is the inverse function of f(x)=x3f(x) = \sqrt[3]{x}?

Tip: When determining the domain of a function, check whether there are any restrictions on the input values, such as square roots or logarithms, which only allow non-negative values.

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Math Problem Analysis

Mathematical Concepts

Functions
Cube Roots
Domains

Formulas

f(x) = √[3]{x}

Theorems

Domain of a function
Properties of cube roots

Suitable Grade Level

Grades 9-12