Question

Use left and right endpoints and the given number of rectangles to find two approximations of the area of the region between the graph of the function and the x-axis over the given interval.
g(x) = 2x2 − x − 1, [3, 5], 4 rectangles

Answer 1

how far did you get?

Answer 2

I got it wrong :/

Answer 3

can you show me what steps you have so I can see where you went wrong

Answer 4

how did you get the `5+6+7+8` ?

Answer 5

that's what it told me to do in the problem before

Answer 6

it's a sum

Answer 7

maybe you were thinking of f(3) + f(3.5) + ...
??

Answer 8

should it be?

Answer 9

let's draw out the graph

Answer 10

here is f(x)