How can answer this problem mathematical?

[James Tursa]

Are you trying to evaluate this in MATLAB? What code have you written so far? What specifically do you need help with?

[Elhussein Aly]

i need to solve the steps of this problem with the code mathematically

unfortunately i did not know how to solve it

[Adam Danz]

Work from the inside out. If it helps, just consider the summation part and give n a constant (n=1).

The variable 'i' will range from 1 to 'a' (let's say a=7). For each i, you need to calculate the fraction.

(1-1)/(1+1)

then (2-1)/(2+1)

then (3-1)/(3+1)

until you get to (7-1)/(7+1)

That will leave you with 7 numbers that you have to add.

Now work in the product part.

n = [1 2 3, ..., 20].

You just calculated the summation for n=1 so now you need to do that again for n=2, ..., n=20; That will leave you with 20 numbers that were the result of the summation.

Your final step is to multiply those 20 numbers.

Functions that will help

• for-loops (2 of them)
• sum()
• prod()

Note that there are methods that don't involve for-loops but they are less intuitive for beginners.

[Elhussein Aly]

thank you pro

Answer 1

[Walter Roberson]

syms a i n nonegative
symprod( symsum( (i-n)/(i+n), i, 1, a), n, 1, 20)

You will get a specific solution in the gamma constant and in the psi function. It probably will not have any intuitive meaning.