CPM Homework Help : CALC Problem 1-145

Cynthia began to draw midpoint rectangles to approximate $A(f, -2 ≤ x ≤ 4)$ for $f ( x ) = \frac { 1 } { 4 } x ^ { 3 } - \frac { 1 } { 2 } x ^ { 2 } - x + 3$ . Trace Cynthia's graph and finish drawing the remaining four midpoint rectangles. Then, compute the estimated area.

Hint:

Make the remaining rectangles. Then calculate the areas of each rectangle and add them together to find $A(f, -2 ≤ x ≤ 4)$ .

More Help:

The width of all of the rectangles is $1$ .