
ôn lại kt cũ
Authored by Nhu Yen Pham
Mathematics
9th - 12th Grade
Used 1+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 1: Phân thức nào dưới đây bằng với phân thức x+y3x (với điều kiện các phân thức đều có nghĩa)?
A. 3x(x+y)^3/9x2(x+y)^2
B. 3x(x+y)^3/9x2(x+y)^3
C. 3x(x+y)^2/9x(x+y)^2
D. 3x(x+y)^3/9x(x+y)^2
A
B
C
D
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 2: Với x≠y, hãy viết phân thức 2/xy^3 dưới dạng phân thức có mẫu là x^5y^5(x−y)
A. 2x^5y^2−2x^4y^3/x^5y^5(x−y)
B. 2x^5y^2−x^4y^3/x^5y^5(x−y)
C. 2(x−y)/x^5y^5(x−y)
D. 2(x^2y−xy^2/x^5y^5(x−y)
A
B
C
D
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 3: Cho tam giác ABC vuông cân ở A. Tính độ dài BC biết AB = AC = 2 dm
A. BC = 4 dm
B. BC = 6–√ dm
C. BC = 8 dm
D. BC = 8–√ dm
A
B
C
D
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 4: Tập nghiệm của phương trình - 4x + 7 = - 1 là?
A. S = {2}
B. S = {- 2}
C. S=3/2
D. S = {3}
A
B
C
D
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 5: Cho D=(5x^2/5x−6)+(x^2−1/6−5x)−7+x−x^2/5x−6. Sau khi thu gọn hoàn toàn thì D có tử thức là:
A. x
B. x + 1
C. x/x−1
D. x/x+1
A
B
C
D
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 6: Phân thức x+y/(x−y)^2 là kết quả của phép chia:
A. (x−y)^2/(x+y)^2.(x−y)^4/(x+y)^3
B. (x−y)^2/(x+y)^2:(x−y)^3/(x+y)^3
C. x−y/(x+y)^2:(x−y)^4/(x+y)^3
D. −(x−y)^3/(x+y)^2:(x−y)^4/(x+y)^3
A
B
C
D
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 7: Cho tam giác vuông ABC vuông tại A, chân đường cao AH của tam giác ABC chia cạnh huyền BC thành hai đoạn thẳng BH = 4 cm, HC = 9 cm. Tính diện tích tam giác ABC?
A. SABC=39cm^2
B. SABC=36cm^2
C. SABC=78cm^2
D. SABC=18cm^2
A
B
C
D
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