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

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