15th derivative of a binomial/maclaurin series

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SUMMARY

The forum discussion focuses on deriving the Maclaurin series for the function sqrt(1+x^4) using the binomial series. The user successfully expresses the series as Σ (k n) (x^(4n)) from n=0 to infinity. To find the 15th derivative at 0, the relationship between the coefficients of the Maclaurin series and the derivatives of the function at zero is emphasized. The discussion highlights the importance of recognizing the pattern in the series expansion to compute higher-order derivatives.

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Homework Statement



sqrt(1+x^4)

use the binomial series to find the maclaurin series for the above function. then use that to find the 15th derivative at 0.


Homework Equations



-binomial series


The Attempt at a Solution



I've gotten to:

[tex]\Sigma[/tex] (k n) (x^(4n))
from n=0 to infinity

How can i use this to find derivatives?
 
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i haven't checked what you've got to...

but if you write out the form for a maclaurin series in terms of its dereivatives, fror ecach term, notice the power of x & the order derivative in the coefficient are always the same
 
[tex]f(x) = f(0) + \frac{f'(0)}{1!}x+\frac{f^''(0)}{2!}x^2+..+\frac{f^{n}(0)}{n!}x^n+..[/tex]

[tex]f(x) = f(0) + \frac{f^{1}(0)}{1!}x^1+\frac{f^{2}(0)}{2!}x^2+..+\frac{f^{n}(0)}{n!}x^n+..[/tex]
 

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