A.张伯伯家养了24只鸡,公鸡x只,母鸡的只数是公鸡的3倍 |
B.合唱队有女生24人,男生x人,女生的人数是男生的3倍 |
C.妈妈比玲玲大24岁,玲玲x岁,妈妈的年龄是玲玲的3倍 |
D.明明有铅笔、钢笔共24支,每支铅笔x元,钢笔的单价是铅笔的3倍 |
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