74×5+26×5=
125×7+125×1=
36×24+14×24=
根据上面的方法完成下面各题,并说说你发现了什么.
74a+26a= 7b+b= 24t+14t= 12xy-3xy=
像上面的74a和26a、7b和b、24t和14t、12xy和3xy这样,所含字母相同,字母前面的数不同,这样的式子叫作同类项.好了,请你根据上面的知识完成下面的问题:
2a+6b-7a-b 3a+2ab+2a-2ab
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