hello can anyone help me with an infinite series problem? i've tried it but i'm kinda stuck

function T = sum(n = 1 to infty)((-1)^{n-1}(n^2+1))/(2^n)
x=input('enter the x value:  ');
epsilon_s=(0.5*10^(2-n));
epsilon=100;
iteration=1;
eps_array(1) = 0;
while epsilon>epsilon_s

(i'm stuck on this step)

Answer 1

[Ameer Hamza]

Try this. It finds the sum symbolically.

syms n

term = (-1)^(n-1)*(n^2+1)/2^n;
y = symsum(term, n, 1, inf);

[Ramdit P]

hmm is that supposed to be put inside the while loop or outside of it?

[Ameer Hamza]

While loop is not needed. symsum() automatically calculates the sum from 1 to infinity.

[Ramdit P]

so all i need is to put that coding and just run it?

[Ameer Hamza]

Yes.

[Ramdit P]

when i ran it, it went into an error :(

[Ameer Hamza]

Change the name of your file from sum.m to something else. And then try again.

[Ramdit P]

there's no result came up :(

[Ameer Hamza]

Check the vakue of variable y.

[Walter Roberson]

That is what is expected from the code. Your code does not ask to display any results.

disp(y)