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Re: Evaluating a sum from terms generated by the Array


davef wrote:
> I want to evaluate a sum from a series I created using the Array
> function.
>
> For example; I specify
>
> Array[((-1)^(# + 1) (x)^#)/# ! &, 3, 1 ]
>
> which gives me the following 3 terms of output:
>
> {x, -(x^2/2), x^3/6}
>
> Can anyone tell if and how I can turn these 3 terms into a sum to be
> evaluated?
>
>
>   
Apply[Plus, Array[((-1)^(# + 1) (x)^#)/#! &, 3, 1]]

LS


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