(1)果园里桃树和杏树共180棵,桃树是杏树的3倍,桃树有多少棵?
(2)果园里桃树和杏树共180棵,桃树是杏树的3倍,杏树有多少棵?
(3)果园里桃树比杏树多90棵,桃树是杏树的3倍,桃树有多少棵?
(4)果园里桃树比杏树多90棵,桃树是杏树的3倍,杏树有多少棵?
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