Derive a formula for the product of the first n members of an arithmetic progression with an initial element a and a common difference d;(a*d>0).
Verify the validity of your expression for (a,d,n)=(2,3,8).

I know this formula is not much help for evaluation purposes if you have no more than a basic calculator, but I’m going to cheat by using Maple for ‘validation’ purposes. So, for (a, d, n) = (2, 3, 8):

...after all, is it really possible to devise a formula that allows you to evaluate this product, with only a basic calculator, more easily than multiplying the original terms together?