Having the right- and left- hand sums within 100 of each other means we want From the problem we can tell that we want to have a = 0 and b = 12, so *f* (a) = *f* (0) = 0
and *f* (b) = *f* (12) = 144.
Plugging all these numbers into the inequality, we want We solve this inequality for *n*: We conclude that we need to use at least 18 rectangles, since we need a whole number of rectangles. |