
Chuong1
Authored by Nguyen Vu
Mathematics
University
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phương trình đường thẳng có độ dốc là 2 và hệ số chặn y là (0, -3) là:
y = 2x + 3
y = -2x + 3
y = 2x - 3
y = -2x - 3
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
-3
3
-2
2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
có
không
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A = 2, B = 1
A = 3, B = -1
A = 1, B = 3
A = -1, B = 3
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong một nghiên cứu về đột biến ở ruồi giấm, các nhà nghiên cứu đã bắn tia X vào ruồi giấm và xác định được rằng tỷ lệ phần trăm đột biến M tăng một cách TUYẾN TÍNH theo liều lượng D của tia X được đo bằng kilo-Roentgen(kR). Khi sử dụng D= 3 (kR) thì M = 7.7%, khi D = 5(kR) thì M = 12.7%. Bao nhiêu phần trăm ruồi giấm sẽ đột biến khi không sử dụng bức xạ?
0.2%
0.3%
0.4%
0.5%
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
không có
x = 1
x = 2
x = -1
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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