从前有个财主,是个刻薄鬼。有一次,刻薄鬼叫仆人去买酒,只给仆人一个酒瓶却不给钱。仆人感到莫名其妙,便问:“老爷,没有钱怎么买酒啊?”财主生气地说“花钱买酒谁不会?不花钱买酒,才算是有能耐呢!”仆人听了,便拿着酒瓶出去了,过了一会儿,仆人拿着空瓶子回来了,说:“酒来了,请喝吧!”财主一见空瓶,大发雷霆,骂道:“岂有此理!酒瓶里没有酒,叫我喝什么?”仆人答道:“
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