macalurins series of x/ e^x -1
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I was solving Taylor series problems for my calculus class and was stuck with this concept.
Suppose a function,
f(x,y)=xey
f(x,y)=xey
And we know that for f(y)=eyf(y)=ey, the Maclaurin series exists as
ey=∑n=0∞ynn!
ey=∑n=0∞ynn!
Then, can I simply multiply xx to the series above such that:
f(x,y)=x⋅∑n=0∞ynn!
f(x,y)=x⋅∑n=0∞ynn!
Because xx is not varied by any nn terms, is it possible to just multiply it?
I'm greatly confused and would appreciate your help.
Thanks,
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