
Cuối kì 2
Quiz
•
Mathematics
•
12th Grade
•
Easy
Ngoc Bao
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21 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho Xo là nghiệm phức có phần ảo âm của phương trình x3 + x + 2 = 0. Tìm số phức z= Xo^2 + 2.Xo +3
A. z = 5/2 -3✓(17).i/2
-2i√(7)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tính tích phân I = Nguyên hàm từ π/4 đến π/2 của cos^3x/sinx.dx
A. -1/4 -ln(√2)
B. -1/4 + ln(√2)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong không gian Oxyz có 2 điểm A(-1,3,1) và B(3,-1,-1). Mặt phẳng trung trực của đoạn AB có phương trình là
2x - 2y - z = 0
2x -2y - z + 1 = 0
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho ba vecto a=(1,2,3) và b=(-2,0,1) và c=(-1,0,1). Khi đó toạ độ của vectơ d= a + b + 2c -3i là
(-3,1,0)
(-6,2,6)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho điểm M(-3,1,2). Điểm M là hình chiếu của M trê mặt phẳng (Oyz) có toạ độ là
(-3,0,2)
(0,1,2)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đường vuông góc chung của hai đường chéo nhau d1 : x-2/2 = y-3/3 = z+5/-5 và d2 : x+1/3 = y-4/2 = z-4/-1 có phương trình là
x/2 = y-2/3 = z-3/-1
x/1 = y/1 = z-1/1
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Điểm M(-2,1,-1) thuộc mặt phẳng nào sau đây
x + 2y - z - 1 = 0
-2x + y - z = 0
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