90-34= 88-19= 45+37= 36+44= 64+36=
43-34= 62-9= 38+46= 77+23= 43+39=
3×7= 6×4= 8×2= 5×9= 9×3=
9×4= 7×4= 6×3= 8×3= 7×5=
8×5= 2×9= 3×4= 8×4= 4×4=
3×6+12= 5×5-7= 4×8+59= 25+25-35= 100-38-18=
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