小刚踢毽子情况统计表
次数 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
个数/个 | 80 | 74 | 65 | 71 | 75 | 75 | 84 | 87 | 95 |
(1)他第( )次踢得最多,第( )次踢得最少,第( )次和第( )次踢得一样多。
(2)他的训练成绩是怎么变化的?
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