Estimate the area under the graph of f(x) = 2from x = 0 to x = 4
x
using four approximating rectangles and right endpoints. (Round your answers to four decimal places.)
yes that is the function.
This is what I have done so far...
a)
split up f(x) into the intervals [0, 1], [1, 2], [2, 3], [3, 4], and used right endpoints, 1, 2, 3, 4 as the heights of the rectangles.
A ≈ 1*2√1 + 1*2√2 + 1*2√3 + 1*2√4
= 6 + 2√2 + 2√3
≈ 12.293
b)
A ≈ 1*2√0 + 1*2√1 + 1*2√2 + 1*2√3
= 2 + 2√2 + 2√3
≈ 8.293
My online hw keeps marking these answers wrong. What am I doing wrong?