
BÀI 1 - 2
Authored by newsky toan8
Mathematics
8th Grade
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40 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đơn thức −3x2y3 có hệ số là
−3x3y2
3x2y3
3
-3
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sau khi thu gọn đơn thức 2.(−3x3y)y2 ta được đơn thức:
−6x3y3
6x3y3
x3y2
−6x2y3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Giá trị của đơn thức 5x4y2z3 tại x=−1;y=−1;z=−2 là
10
20
-40
40
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kết quả sau khi thu gọn biểu thức đại số 9(x2y2)4x−(−2xy)3x2y+3(2x)4xy4 là
59x5y4
49x5y4
65x5y4
17x5y4
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Xác định hằng số a để các đơn thức axy3,−4xy3, 7xy3 có tổng bằng 6xy3
a = 9
a = 1
a = 3
a = -3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho các biểu thức A=4x3y(−5xy),B=−17x4y2. Đa thức A.B là
74x8y4
740x4y2
−740x8y4
340x8y4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Bậc của đa thức x2y5−x2y4+y6+1 là
4
5
6
7
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