
Bài 2 : Phép Tính Logarit
Authored by Anh Khôi Trần Nguyễn
Mathematics
11th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho a b là hai số thực dương tùy ý và a≠1 . loga²b bằng ?
1/2logab
2logab
2+logab
2-logab
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Với a là số thực dương khác 1 , ta có log3(a)2 bằng
2.log3a
2.loga3
1/2.log3a
1/(2.loga3)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Với a b là các số thực dương tùy ý và a≠1 logab2 bằng
1/2.logab
2.logab
2+logab
1/2+logab
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho a là số thực dương khác 1 thỏa loga2=3 . Khẳng định nào sau đây đúng?
a2=3
a3=2
2a=3
3a=2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho số thực dương a ≠1. Giá trị của biểu thức aloga2 bằng
loga2
log2a
a
2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho a b c là các số dương và a ≠ 1 mệnh đề nào sau đây sai ?
loga(1/b)=-logab
loga(b+c)=logab.logac
loga(b/c)=logab-logac
loga(b.c)=logab+logac
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho ba số dương a x y với a ≠1. Khẳng định nào sau đây đúng?
loga(x/y)=logax-logay
loga(x/y)=logax/logay
loga(x-y)=logax-logay
loga(x-y)=logax/logay
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