What is the Taylor polynomial for x^x around the point a=1?

[danik_ejik]

hello,
please help to calculate the taylor polynomial for
[URL]http://latex.codecogs.com/gif.latex?f(x)=x^{x}-1[/URL] around the point a=1

i thought to write it as g(x)=x^x
and then f(x)=g(x)-1
and then find the polynomial for g(x) as lng(x)=xln(x)
but it seems incorrect.

 

[hunt_mat]

In order to do this you have to calculate the derivative if y=x^{x}$, take logs of this equation and differentiate that using implicit differentiation and that will help you, or you could write:
<br /> x^{x}=e^{x\log x}<br />
And use the chain rule

 

[danik_ejik]

thanks,
successfully managed by directly calculating the taylor polynomial when
[URL]http://latex.codecogs.com/gif.latex?f(x)=e^{xlnx}[/URL]