①4+5= ②3+7= ③6+6= ④8+2+5=
⑤9+3= ⑥9-0= ⑦13-10= ⑧9+8-10=
⑨10-2= ⑩15-3= ⑪12+3= ⑫14-2-9=
⑬12-5= ⑭9+6= ⑮6+8= ⑯17-7+5=
⑰11+7= ⑱11-8= ⑲14-9= ⑳4+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