Showing posts with label infinite expansion. Show all posts
Showing posts with label infinite expansion. Show all posts

Friday, 22 April 2016

Taylor Series

My diurnal age today is 24491 and this number features in OEIS A077946:  


 A077946

Expansion of \( \dfrac{1}{1 - x - 2x^2 - 2x^3} \)       
                              


The number arises as a coefficient of \(x\) in the Taylor Series expansion of the function at \(x=0\). The coefficients listed up to 24491 are:

1, 1, 3, 7, 15, 35, 79, 179, 407, 923, 2095, 4755, 10791, 24491

This means that the function can be expressed as:

\(1 + x + 3x^2 + 7x^3 + 15x^4 + 35x^5 + \dots \)

The Taylor Series for any continuous function \( f(x)\)at a point \(x=a\) is given by the following expression:$$f(x)=f(a)+\frac{f'(a)}{1!} (x-a) + \frac{f''(a)}{a!} (x-a)^2+ \frac{f'''(a)}{3!} (x-a)^3 + \dots$$
A Maclaurin Series is a Taylor Series where \(a=0\).

Here is a permalink that will display these results using SageMathCell. I have a later post about Taylor Series that I created on April 27th 2018.

REFURBISHED on Saturday November 26th 2022