
toán
Authored by Bằng chíu
Mathematics
12th Grade
Used 2+ times

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68 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hình hộp ABCD.A’B’C’D’. Tìm mệnh đề sai trong các mệnh đề dưới đây
AD’=BC’
BC=A’D’
AB=CD
AB=D’C’
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong không gian, cho ba điểm A,B,C tuỳ ý. Mệnh đề nào đúng
AB-BC=AC
AB-AC=CB
AB+CB=AC
AB+AC=BC
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hình hộp ABCD.A’B’C’D’, tổng của DA+DC+DD’ là vecto nào
DB’
DB
BD
BD’
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho a và b là hai vecto cùng hướng và đều khác vecto 0. Mệnh đề nào đúng
a.b=|a|.|b|
a.b=0
a.b=-1
a.b=-|a|.|b|
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho tứ diện ABCD. Hỏi có bao nhiêu vecto khác vecto 0 mà mỗi vecto có điểm đầu, điểm cuối là hai đỉnh của tứ diện ABCD
12
4
10
8
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hình hộp ABCD.A’B’C’D’ có tâm O. Đặt AB=a, BC=b. M là điểm xác định bởi OM=1/2(a-b). Khẳng định nào đúng
M là tâm h h ABB’A’
M là trung điểm BB’
M là tâm hbh BCC’B’
M là trung điểm CC’
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hình chóp S.ABCD có đáy ABCD là hbh. Đặt SA=a, SB=b, SC=c, SD=d. Khẳng định nào đúng
a+c=d+b
a+d=b+c
a+b=c+d
a+b+c+d=0
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