summation of exponential series

where ⱷl(n)=[0 1.57 3.14 4.71] the matlab code for this function. Here L=4

[Adam]

And your question is?

[Guillaume]

Calculation the sum expression on the left of the =0 is trivially done for either expression, particularly as is only 4 elements. Hopefully, that's not what is asked.

However, it is unclear what the purpose of the =0 is. If the equation has to be solved, what is the unknown variable? It doesn't appear that there is any.

[sesha sai]

here l=4 and left =0 for the range of values selected between 0<k<N

[Jan]

@sesha sai: You forgot to ask a question.

[sesha sai]

matlab code for that given function