>
h:= x -> x^2 +
3;
>
rightbox(h(x), x
= 0..4, 8, color
= blue, shading
= gray);
>
rightsum(h(x), x
= 0..4,
8):%=evalf(%);
>
rightbox(h(x), x
= 0..4, 16,
color = blue,
shading = gray);
>
rightsum(h(x), x
= 0..4,
16):%=evalf(%);
>
rightbox(h(x), x
= 0..4, 128,
color = blue,
shading = gray);
>
rightsum(h(x), x
= 0..4,
128):%=evalf(%);
>
Int(h(x),x):%=value(%)+C;
>
Int(h(x), x =
0..4):%=evalf(%);