
toán
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Others
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1st Grade
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Medium

daothimai02012008 apple_user
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21 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
cho a>0,m,n thuộc R . khẳng định nào sau đây sai
(am )n =an.m
am.an=a m+n
(am)n =(an)m
am/an=an-m
2.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
cho hình hộp chữ nhật ABCD.A’B’C’D’. khẳng định nào sau đây là đúng?
CB vuông góc (ADD’A’)
AB vuông góc (CDD’C’)
B’B vuông góc (ACC’A’)
CD vuông góc (AA’D’D)
3.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
cho hình chóp S.ABCD có đây hình vuông , SA vuông góc với đáy . góc giữa đường thẳng SD và mặt phẳng (ABCD) là :
góc SCA
góc CAS
góc SDA
góc ASD
4.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
nếu đường thẳng d vuông góc với mặt phẳng (a) thì góc giữa đường thẳng d và mặt phẳng (a) bằng :
60
90
30
45
5.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
tập xác định của hàm số y=17x là
R
(0;+vô cực)
R/{0}
[0;+vô cực)
6.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
tập xác định của hàm số y=log3(x-5) là
(-∞;5)
(-∞;+∞)
(5;+∞)
[0;+∞)
7.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
hàm số nào dưới đây đồng biến trên TXĐ của nó
y= (1/e)x
y=(2/3)x
y=2x
y=(1/3)x
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