整数乘法符号规则演示

GeoGebra 命令及参数

1. Arc((x - a / 2)^(2) = a / 2, (0, 0), (a, 0)) → c
2. If(b < 0, Sequence[(((-a) * n), 0), n, 0, (-b)], Sequence[((a * n), 0), n, 0, b]) → lista3
3. Sequence(Semicircle[Element[lista3, n], Element[lista3, n + 1]], n, 1, abs(b)) → lista1
4. Sequence((t, a / 2), t, a / 2, (a * b), a) → listarrowsRight
5. If(a > 0 ∧ b > 0 ∨ a < 0 ∧ b < 0, abs(a) / 2, ((-abs(a))) / 2) → f
6. Sequence((t, If[a > 0 ∧ b > 0 ∨ a < 0 ∧ b < 0, abs(a) / 2, ((-abs(a))) / 2]), t, ((a * b)) / abs(b) / 2, (a * b), If[(a * b) > 0, abs(a), (-abs(a))]) → listarrowsleft
7. Sequence((t, abs(a) / 2), t, abs(a) / 2, abs((a * b)), abs(a)) → listarrowsfordoublenegativeonly