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Quiz
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Mathematics
•
11th Grade
•
Practice Problem
•
Easy
Diệp Thúy Hằng 11c2
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41 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Phương trình 2cosx-√2=0 có họ nghiệm là
A. ×=± π/4+k2π, k € Z
B. ×=± π/6+k2π, k € Z
C. ×=± π/5+k2π, k € Z
D. ×=± π/3+k2π, k € Z
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cho dãy số (Un) xác định bởi {u1=1 Un+1=Un+2 (n≥1). Tính u2.
A. U2=7
B. U2=3
C. U2=9
D. U2=5
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cấp số cộng (Un) có số hạng đầu u1=3, công sai d=–2. Tìm u5.
A. U5=1.
B. U5=8.
C. U5=–5.
D. U5=–7.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Dãy số nào sau đây là cấp số nhân?
A. 2;3; 4.
B. 1;2; 4
C. 1;2; 3.
D. 4;5; 6.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cho CSN (Un) với Un=(–2n).(n€N) thì tổng 3 số hạng đầu tiên của CSN (Un) là:
A. S³ =–6
B. S³ =8
C. S³ =6
D. S³ =10
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cho mẫu số liệu phép nhóm về số tiền ( nghìn đồng ) mà sinh viên chỉ cho thanh toán cước điện thoại trong tháng như sau
A.150.
B.50.
C.200.
D.175.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cho góc hình học uOv có số đo 30° (như hình bên dưới). Số đo của các góc lượng giác (Ov,Ou) bằng
A.30°.
B.–30°.
C.–30°+k360° (k€Z).
D. 30°+k360° (k€Z).
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