7×9= 4×8= 6×3= 4×8-16=
2×2= 5×3= 6×5= 8×7=
4×4= 7×6= 9×3= 9×8=
2×5= 6×4= 1×1= 4×3+4=
3×9= 5×1= 3×3= 8×7-6=
3×2= 4×6= 9×7= 3×8+5=
8×9= 6×7= 5×4= 9×7-7=
5×7= 7×8= 5×8= 6×9+9=
3×6= 4×3= 7×4= 5×2=
3×1= 2×1= 7×7= 4×2+3=
6×8= 2×9= 4×9= 3×8-2=
8×1= 5×6= 9×7= 2×5+8=
7×3= 2×6= 7×5= 6×9-7=
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