symbolic integer, Why doesn't it work?

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Katalin Kuchinka 2021-2-1

评论： Katalin Kuchinka 2021-2-8

I want to find the sum:

I tried finding with symbolic integer

syms n t

evalin(symengine,'assume(n,Type::Integer)');

symsum(exp(-k^2*t),k,1,n-1)

syms n t

evalin(symengine,'assume(n,Type::Integer)');

symsum(exp(-k*k*t),k,1,n-1)

I have got the next answer

Shubham Rawat 2021-2-4

Hi Katalin,

You may try this:

syms  k t
evalin(symengine,'assume(n,Type::Integer)');
n = 3; %taking input from workspace
symsum(exp(-k*k*t),k,1,n-1)

Result :

ans =
 
exp(-t) + exp(-4*t)

Hope this Helps!

Thanks. But, I want to create a function f(t,n).

I need to find

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