Could anyone help me to solve the error in the following code

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jaah navi
jaah navi 2018-9-5
评论： jaah navi 2018-9-5
code:
syms n k
n=4
k=0
symsum(nchoosek(n,k),k,0,n)
If i run the code it gives error stating Undefined function 'symsum' for input arguments of type 'double'.
Could anyone help me how to overcome it.

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Walter Roberson
Walter Roberson 2018-9-5
>> syms n k
>> symsum(nchoosek(n,k),k,0,n)
ans =
2^n
>> subs(ans, n, 4)
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更多回答（1 个）

GK
GK 2018-9-5
You need to have Symbolic Math Toolbox. Please check the link Symsum undefined function error.
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GK
GK 2018-9-5
Could you share your code or example of it. Also I want to know, if its series is finite or infinity?
Walter Roberson
Walter Roberson 2018-9-5
You would not have been able to use
syms n k
without the Symbolic Math toolbox -- not unless you happened to have Maple installed instead.

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