7×5= 36÷9= 8×3= 9×6=
15÷5= 6×7= 4÷4= 18÷3=
8×8= 40÷8= 6×8= 8×7=
81÷9= 7×7= 20÷5= 35÷5=
3×9= 64÷8= 16÷2= 6×4=
6×5+4= 2×9-8= 3×4÷6=
63÷7÷3= 3×3×7= 42÷7×4=
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2