① ② ③ ④
3×1=3 6×1=6 5×1=5 8×1=8
3×2=6 6×2=12 5×2=10 8×2=16
3×3=9 6×3=18 5×3=15 8×3=24
3×4=12 6×4=24 5×4=20 8×4=32
3×5=15 6×5=30 5×5=25 8×5=40
3×6=18 6×6=36 5×6=30 8×6=48
3×7=21 6×7=42 5×7=35 8×7=56
3×8=24 6×8=48 5×8=40 8×8=64
3×9=27 6×9=54 5×9=45 8×9=72
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