Câu1 : Số nào sau đây là căn bậc hai số học của số a = 2,25A. – 1,5 và 1,5 B. 1,25 C. 1,5 D. – 1,5Câu 2 : Khẳng định nào sau đây là đúng?A. √(A^2 ) = A nếu A < 0 B. √(A^2 ) = A nếu A ≥ 0 *C. √A < √B A < B D. A > B√A < √BCâu 3 : So sánh hai số 2 và 1 + √2 Câu 4 : Biểu thức có nghĩa khi:A. x < 3 B. x < 0 C. x ≥ 0 D. x ≥ 3 Câu 5 :...
Đọc tiếp
Câu1 : Số nào sau đây là căn bậc hai số học của số a = 2,25
A. – 1,5 và 1,5 B. 1,25 C. 1,5 D. – 1,5
Câu 2 : Khẳng định nào sau đây là đúng?
A. √(A^2 ) = A nếu A < 0 B. √(A^2 ) = A nếu A ≥ 0 *
C. √A < √B A < B D. A > B√A < √B
Câu 3 : So sánh hai số 2 và 1 + √2
![](data:image/png;base64,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)
Câu 4 : Biểu thức
có nghĩa khi:
A. x < 3 B. x < 0 C. x ≥ 0 D. x ≥ 3
Câu 5 : Giá trị của biểu thức
là:
A. 12 B. 13 C. 14 D. 15
Câu 6 : Tìm các số x không âm thỏa mãn √x ≥ 3
A.x ≥ 9 B. x > 9 C. x < 9 D. √x ≥ 9
Câu 7 : Tìm giá trị của x không âm biết ![](data:image/png;base64,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)
A. x = 225 B. x =-15 C. x = 25 D. x = 15
Câu 8 : Rút gọn biểu thức sau ![](data:image/png;base64,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)
![](data:image/png;base64,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)
Câu 9 :Tính giá trị biểu thức ![](data:image/png;base64,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)
![](data:image/png;base64,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)
1 A
2 D
3 B
4 A
5 A
Câu 1: Cho số thực a > 0. Số nào sau dây là căn bậc hai số học của a?
Lời giải:
Với số dương a, số √a được gọi là căn bậc hai số học của a
Đáp án cần chọn là: A
Câu 2: Cho số thực a > 0. Căn bậc hai số học của a là x khi và chỉ khi
Lời giải:
Với số dương a, số x được gọi là căn bậc hai số học của a khi và chỉ khi
Đáp án cần chọn là: D
Câu 3: Số bào sau đây là căn bậc hai số học của số a = 0,36
A. – 0,6
B. 0,6
C. 0,9
D. – 0,18
Lời giải:
Căn bậc hai số học của a = 0,36 là √0,36 = 0,6
Đáp án cần chọn là: B
Câu 4: Số nào sau đây là căn bậc hai số học của số a = 2,25
A. – 1,5 và 1,5
B. 1,25
C. 1,5
D. – 1,5
Lời giải:
Căn bậc hai số học của a = 2,25 là √2,25 = 1,5
Đáp án cần chọn là: C
Câu 5: Khẳng định nào sau đây là đúng?
Lời giải:
Đáp án cần chọn là: C
HT nhé ông bn