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Wolfram Language & System Documentation Center
CubeRoot
  • See Also
    • Power
    • Sqrt
    • Surd
    • Re

    • Characters
    • \[CubeRoot]
  • Related Guides
    • Elementary Functions
    • GPU Computing
    • GPU Computing with NVIDIA
    • GPU Computing with Apple
    • See Also
      • Power
      • Sqrt
      • Surd
      • Re

      • Characters
      • \[CubeRoot]
    • Related Guides
      • Elementary Functions
      • GPU Computing
      • GPU Computing with NVIDIA
      • GPU Computing with Apple

CubeRoot[x]

gives the real-valued cube root of x.

Details
Details and Options Details and Options
Examples  
Basic Examples  
Scope  
Numerical Evaluation  
Specific Values  
Visualization  
Show More Show More
Function Properties  
Differentiation  
Integration  
Series Expansions  
Function Identities and Simplifications  
Applications  
Properties & Relations  
Possible Issues  
See Also
Related Guides
Related Links
History
Cite this Page
BUILT-IN SYMBOL
  • See Also
    • Power
    • Sqrt
    • Surd
    • Re

    • Characters
    • \[CubeRoot]
  • Related Guides
    • Elementary Functions
    • GPU Computing
    • GPU Computing with NVIDIA
    • GPU Computing with Apple
    • See Also
      • Power
      • Sqrt
      • Surd
      • Re

      • Characters
      • \[CubeRoot]
    • Related Guides
      • Elementary Functions
      • GPU Computing
      • GPU Computing with NVIDIA
      • GPU Computing with Apple

CubeRoot

CubeRoot[x]

gives the real-valued cube root of x.

Details

  • CubeRoot[x] returns the real-valued cube root for real-valued x.
  • For symbolic x in CubeRoot[x], x is assumed to be real valued.
  • CubeRoot can be evaluated to arbitrary numerical precision.
  • CubeRoot automatically threads over lists.
  • In StandardForm, CubeRoot[x] formats as .
  • can be entered as cbrt.
  • ∛z can also be used for input. The ∛ character is entered as cbrti or \[CubeRoot].

Examples

open all close all

Basic Examples  (5)

CubeRoot gives a real root:

Plot over a subset of the reals:

Enter using cbrt:

Note that this is not the same as , which is Power[x,1/3]:

Compare the real and imaginary parts of and over the reals:

Series expansion:

Scope  (36)

Numerical Evaluation  (6)

Evaluate numerically:

Evaluate to high precision:

The precision of the output tracks the precision of the input:

Evaluate efficiently at high precision:

CubeRoot threads elementwise over lists and matrices:

Compute average case statistical intervals using Around:

Compute the elementwise values of an array:

Or compute the matrix CubeRoot function using MatrixFunction:

Specific Values  (4)

Values of CubeRoot at fixed points:

Values at zero:

Values at infinity:

Find a value of for which the using Solve:

Substitute in the result:

Visualize the result:

Visualization  (3)

Plot the CubeRoot function:

Visualize the absolute value and argument (sign) of :

The function has the same absolute value but a different argument for :

Polar plot with :

Function Properties  (9)

CubeRoot is defined on the real numbers:

The range of CubeRoot is all real numbers:

Enter a ∛ character as \[CubeRoot], followed by a number:

is not an analytic function:

Neither is it meromorphic:

is non-decreasing:

is injective:

And surjective:

is neither non-negative nor non-positive:

is continuous on the reals but has a singularity at :

It is singular because it is not differentiable:


is neither convex nor concave:

Differentiation  (3)

First derivative with respect to x:

Higher derivatives with respect to x:

Plot the higher derivatives with respect to x:

Formula for the ^(th) derivative with respect to x:

Integration  (4)

Compute the indefinite integral using Integrate:

Verify the anti-derivative:

Definite integral:

Definite integral of CubeRoot over a symmetric interval is 0:

More integrals:

Series Expansions  (4)

Find the Taylor expansion using Series:

Plots of the first three approximations around :

General term in the series expansion using SeriesCoefficient:

The first-order Fourier series:

Taylor expansion at a generic point:

Function Identities and Simplifications  (3)

Primary definition:

Products can be combined using FullSimplify:

CubeRoot commutes with integer exponentiation:

Applications  (1)

Solve a differential equation with CubeRoot:

Properties & Relations  (5)

CubeRoot is only defined for real inputs:

CubeRoot is a bijection on the reals:

Use CubeRoot to find real cube roots:

Use Power[x,1/3] or to find the principal complex cube root:

The generating function for CubeRoot:

Find the integral of a function containing CubeRoot:

Visualize the function and the signed area between it and the axis:

Possible Issues  (1)

On the negative real axis, CubeRoot[x] is different from the principal root returned by Power[x,1/3]:

See Also

Power  Sqrt  Surd  Re

Characters: \[CubeRoot]

Related Guides

    ▪
  • Elementary Functions
  • ▪
  • GPU Computing
  • ▪
  • GPU Computing with NVIDIA
  • ▪
  • GPU Computing with Apple

Related Links

  • MathWorld

History

Introduced in 2012 (9.0) | Updated in 2020 (12.1)

Wolfram Research (2012), CubeRoot, Wolfram Language function, https://reference.wolfram.com/language/ref/CubeRoot.html (updated 2020).

Text

Wolfram Research (2012), CubeRoot, Wolfram Language function, https://reference.wolfram.com/language/ref/CubeRoot.html (updated 2020).

CMS

Wolfram Language. 2012. "CubeRoot." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2020. https://reference.wolfram.com/language/ref/CubeRoot.html.

APA

Wolfram Language. (2012). CubeRoot. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/CubeRoot.html

BibTeX

@misc{reference.wolfram_2025_cuberoot, author="Wolfram Research", title="{CubeRoot}", year="2020", howpublished="\url{https://reference.wolfram.com/language/ref/CubeRoot.html}", note=[Accessed: 01-February-2026]}

BibLaTeX

@online{reference.wolfram_2025_cuberoot, organization={Wolfram Research}, title={CubeRoot}, year={2020}, url={https://reference.wolfram.com/language/ref/CubeRoot.html}, note=[Accessed: 01-February-2026]}

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