9+2= 9+3= 9+6= 9+7= 2+9= 3+9 =
6+9= 7+9= 4+9= 9+5= 9+9= 6+6=
9+4= 9+8= 8+7= 7+7= 8+8= 8+4=
6+8= 7+5= 7+4= 8+3= 5+6= 6+3=
8+5= 7+6= 7+8= 4+9= 6+7= 5+7=
16+2= 14-4= 13+6= 19-8= 5+7= 7+7=
19-9=
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