Enter the maximum value of the (n+1)th derivative on the interval and the radius to determine the Taylor inequality error. This calculator helps to estimate the error bound of a Taylor polynomial approximation.

Taylor Inequality Error Formula

The following formula is used to calculate the Taylor inequality error.

E = frac{|f^{(n+1)}(x)| cdot r^{n+1}}{(n+1)!}

Variables:

  • E is the error of the Taylor polynomial approximation
  • |f^(n+1)(x)| is the maximum value of the (n+1)th derivative on the interval
  • r is the radius of the interval around the point of approximation
  • (n+1)! is the factorial of n+1

To calculate the Taylor inequality error, multiply the maximum value of the (n+1)th derivative by the radius raised to the power of n+1, and then divide by the factorial of n+1.

What is Taylor Inequality Error?

Taylor inequality error is an estimation of the error made when using a Taylor polynomial to approximate a function. It is based on the remainder term of Taylor’s theorem, which provides a bound on the error. This error bound is useful for determining the accuracy of the approximation and for deciding how many terms of the Taylor series are needed to achieve a desired level of precision.

How to Calculate Taylor Inequality Error?

The following steps outline how to calculate the Taylor Inequality Error.


  1. First, determine the maximum value of the (n+1)th derivative on the interval |f^(n+1)(x)|.
  2. Next, determine the radius (r) of the interval around the point of approximation.
  3. Next, gather the formula from above = E = |f^(n+1)(x)| * r^(n+1) / (n+1)!.
  4. Finally, calculate the Taylor Inequality Error (E).
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Maximum value of the (n+1)th derivative on the interval |f^(n+1)(x)| = 24

Radius (r) = 0.5

Assuming n = 3 for this example, calculate the Taylor Inequality Error (E).