[填空题]
Consider the region R enclosed;vvg qws l672a6cft;d by 0w1,osh ju/s lthe curve y=$\frac{1}{2}(x+2)(x-3)$ and the x -axis.
1. Sketch the curve and shade the region R on the following axes.
2. 1. Write down an integral that represents the area of region R .
2. Find the area of region R is A ≈ units$^2$(one decimal please)
3. Estimate the area of region R using five trapezoids.
it is ≈ $units^2$ (round number)
4. Find the percentage error between the exact value found in part (b)(ii) and the estimation in part (c).
