Create a symbolic function with varying number of elements

I wish to create a symbolic function where N is an arbitrary integer. For a specific case N is known and the number of elements in the function is thus defined, but N will vary across different cases and I need to automate the creation of .

Any help would be appreciated.

Answer 1

[madhan ravi]

syms x
N=4;
f(x)=sum(x.^(0:N))

[Luka Lorbek]

Thanks!