Need help understanding summation notation problem...
So i'm doing some problems in my discrete math book. I ran into this little problem that has a solution in the appendix which I simply do not understand.
"Write each of 32-41 using summation or product notation.
40. n + (n - 1) + (n - 2) + ... + 1
The answer in the appendix says:
(n - i) where i = 0 is the lower limit and n-1 is the upper limit
I don't get this; that '... + 1' in the problem is throwing me off.
If you understand this, would you mind explaining this summation form to me.