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9×7 = 35÷5 = 6×9 = 64÷8 =
7×3 = 8×2 = 9÷1 = 10÷5 =
18÷2 = 56÷7 = 9×8 = 4×4 =
1×6 = 4×9 = 25÷5 = 42÷7 =
7×8 + 5 = 2×6－9 = 2×4×3 =
56÷8÷7 = 54÷6×3 = 12÷3×6 =
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
