Examine the Riemann sum below for the area under f(x). Homework Help ✎
How many rectangles were used?
If the area being approximated is A(f, a ≤ x ≤ b), what are a and b?
Notice that the index starts at 0 and ends at 11.
a = 3 is easy to spot in a Riemann sum. Now find the end-value, b.
General form of a left-endpoint Riemann sum:
You already computed how many rectangles there are part (a).