Since n = 10,

`h=Deltax=(1-0.5)/10=0.05`

Here are the 10 rectangles we are using this time:

Required area - using 5 upper rectangles0.10.20.30.40.50.60.70.80.910.51xf(x)Open image in a new page

Required area with `n=10` (upper rectangles).

We take the outer rectangles and find the areas (10 of them) as follows:

`A=sum_(i=1)^10A_i`

`=(0.6975+0.64+0.19+` `...+0.9755+` `{:0)(0.05)`

`=3.7875(0.05)`

`=0.189375`

Please support IntMath!