Honestly I don’t even know what this is sorry I tried
Pretty sure it’s 25 but I could be wrong. It’s also rly blurry. Hope this helps
We haven n! = (n-1)! x n and (n+1)! = n! x (n + 1);
Then, (n!)^2 = n! x n! = n! x (n-1)! x n;
And (n+1)!(n-1)! = n! x (n + 1) x (n-1)!;
Finally, [n! x (n-1)! x n] / [n! x (n + 1) x (n-1)!] = (n+1)/n;
You will need 7 because 150 divided by 20 is 7
