I want to express this in a general form but not sure on how to do so. The problem given ends up with having to subtract 1 then 2 then 3 then.... until the value reaches 0.
(4x6) + (3x5) + (2x4) + (1x3) + (0x2)
Another
(5x5) + (4x4) + (3x3) + (2x2) + (1x1) (0x0)
How would I express this in sigma notation?
Thank you!