The For loop will be incremented only N-1 times. One case is taken care of already when the first coefficient is brought down (on paper) or moved to list 2 (in the program).
Does the increment of 1 on the for loop necessary? Why or why not?
Let's analyze the expression stored into list 2. It will begin at L1(2). L1(2) is added to the product of constant R and L2(1). What is the value of L2(1)? Remember, it was established previous to this For loop.
The next increment, L1(3) is added to the product of R and L2(2). This value is then entered as L2(3), which will be used for the next loop.