
Stanton D. answered 01/17/20
Tutor to Pique Your Sciences Interest
Hi Arianna P.,
I'll help you on this, but there's something you SHOULD have already done, and that's to translate each of these choices into the formal math form notation. There's absolutely no way that you can compare the text statements, or even coherently think about them without doing this. Once you have done that, you can ask questions such as the following. All four criteria below must be met:
(1) Does notation do a slicing into an infinite number (n) of parts? (by using the (range / n) as a factor) [all do]
(2) Does the choice take the limit as the number of slices goes towards infinity? [only 2 out of the 4 do]
(3) Does the primary function inside the summation take the same function form (here, second power) as the function in the problem statement? [all do]
(4) Does the primary function inside the summation, and inside the "quantity" limits, run over the same argument range when (i/n) goes from 0 to 1, as does the original integration in the problem statement? [aha, only 1 out of the 4 does this correctly]
-- Cheers, -- Mr. d.