399+167= 6.87﹣3.25= 0.25+0.75= 0.78+0.22= 400﹣35﹣65=
(25+125)×4= 360÷18= 0.54×100= 8×39+8= 1﹣0.2﹣0.8=
65.8÷100= 328﹣109= 13×25×4= 21+243+79= 3600÷400=
5+4.3+7.5= (16+64)×4= 2.5×10= 18×400= 10﹣(2.3+2.7)=
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