
Tốn loan
Authored by vinh đinh
Mathematics
9th - 12th Grade
Used 1+ times

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26 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho tứ diện ABCD.Hỏi có bao nhiêu vectơ khác vectơ 0 mà mỗi vectơ có điểm đầu,điểm cuối là hai đỉnh của tứ diện ABCD?
12
4
10
8
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đẳng thức nào sau đây là qui tắc 3 điểm trong phép cộng vectơ
OA-OB=BA
MA+MB=2MI với I là trung điểm AB
AB+BC=AC
AB+CD=AD+CB
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hình chóp S.ABCD có đáy ABCD là hình vuông.Khẳng định nào dưới đây là đúng ?
AB=SA-SB
AB+BC=AC
AC=BD
AB=CD
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hình lập phương ABCD.A'B'C'D'.Mệnh đề nào sau đây sai?
AB+AD+AA'=AC'
AC=AB+AD
|AB|=|CD|
AB=CD
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hình hộp ABCD.A'B'C'D'.Chọn đẳng thức vectơ đúng:
AC'=AB+AB'+AD
DB'=DA+DD'+DC
AC'=AC+AB+AD
DB=DA+DD'+DC
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hình lập phương ABCDEFGH,thực hiện phép toán:x=CB+CD+CG
x=CE
x=CH
x=EC
x=GE
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hình tứ diện ABCD có trọng tâm G.Mệnh đề nào sau đây sai?
GA+GB+GC+GD=0
OG=1/4(OA+OB+OC+OD)
AG=2/3(AB+AC+AD)
AG=1/4(AB+AC+AD)
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