A.欢欢家与乐乐家相距1000米,欢欢步行速度为60米/分,乐乐步行速度为40米/分,两人同时从家里出发去找对方,经过x分相遇。 |
B.甲、乙两个工程队同时修一条长1000米的路,甲队每天修60米,乙队每天修40米,经过x天修完。 |
C.李老师打一份1000字的稿件,前面每分打60字,后面每分打40字,前后共用了x分。 |
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