Help me to solve a problem please.

i need to solve f(x)=e^(-x), intervals [-π<x<π] using fourier series. And need to graph it. would really appreciate the help. thanks.

Answer 1

[Chandrasekhar]

cnt = 1;
for i = -pi:pi
    x(cnt) = i;
    f(cnt) = exp(-i);
    cnt = cnt+1;
end
plot(x,f)
xlabel('pi values')
ylabel('f(x)')
grid on