3+( )=8 8-( )=2 ( )-4=4 6+( )=8 ( )-2=6 8-( )=2
( )-3=5 8-( )=7 ( )+2=8 ( )-3=5 3+( )=8 3+5=
8-7= 5+2= 6+2= 5+3= 8-3= 8-4=
8-2= 2+6= 3+5= 4+4= 8-2= 8-4=
8-6= 6+2= 5+3= 8-5=
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