Question

Riemann's midpoint to approximate the area, given a table in the interval [0,2], and n=4:

Answer 1

So here is my table. Since n=4 in the interval [0,2], I thought of using my x-coords as 0.5, 1, and 1.5.

v(0.5) = 50
v(1) = 40
v(1.5) = 30

Which adds up to 120, however that wasn't the correct answer.

Answer 2

nvm I found my mistake, it should be
v(0.25)
v(0.75)
v(1.25)
v(1.75)

durrr