70+2= 25-5= 2+60= 73-3=
29-9= 13+4= 3+60= 82-2=
16-8= 85-5= 6+70= 8+50=
4+70= 12-9= 90+5= 74-4=
48-8= 9+7= 60+9= 17-9=
10-7= 70+9= 14-8= 7+20=
4+( )=14 15-( )=6 ( )+7=11
4+6-7= 17-9+8= 18-9-4=
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