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nguyenmihoa418
2 năm trước
Giúp mình với nhau chỉ có mấy câu trắc nghiệm Câu 1:Trong các biểu thức đại số Sau Biểu thức nào không phải là đơn thức A. 2 B. 5 x + 9 C. x³ y² D. 3x Câu 2: Tính giá trị của đơn thức 5x⁴y²z³ tại x=-1,y=-1,z=-2 A. -10 B. 10 C. 30 D. 40 Câu 3: cho đơn thức A=x²y³z. Khẳng định nào sau đây sai ? A. Đơn thức A có bậc là 6 B. Giá trị của đơn thức A là 1 C. Hệ số của đơn thức A là 1 D. Phần biến của đơn thức A là xyz Câu 4: Tìm phần biến trong đơn thức100bã²yz với a,b lá hằng số A. bax²yz B. x²y C. x²yz D. 100ab Câu 5: tính của hai đơn thức ¼x⁵y và -8x³y⁵là: A. 2x³y⁵ B. -2x⁶y⁶ C. -4x³y⁵ D. 4x⁶y⁶
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