Câu 4: Với a,b là hai số dương tùy ý thì $$\log\left(a^3.b^2\right)$$ có giá trị bằng biểu thức nào sau đây ?

A. $$\frac{1}{3}\log a\ +\frac{1}{2}\log b$$

D. $$\frac{1}{2}\log a\ +\frac{1}{3}\log b$$

Câu 5: Tập xác định của hàm số $$y=\log_3\left(x-4\right)$$ là:

A. $$D=\left(4;+\infty\right)$$

C. $$D=\ \left(-\infty;4\right)$$

Câu 7: Cho ba số thực dương a,b,c và a $$\ne$$ 1, mệnh đề nào sau đây là sai?

D. $$\log_ab\ =\frac{\ln a}{\ln b}$$

A. $$\log_a\left(b.c\right)=\log_ab\ +\log_ac$$

C. $$\log_ab^{\alpha}\ =\alpha.\log_ab$$

Câu 9: Tập nghiệm của bất phương trình $$15^{2x}\

C. S = $$\left(-\infty;4\right)$$

A. S = $$\left(4;+\infty\right)$$

B. S = $$\left(-\infty;-4\right)$$

D. S = $$\left(-4;+\infty\right)$$

Kiểm tra bài cũ Ôn tập chương IV

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Kiểm tra bài cũ Ôn tập chương IV

Quiz

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Mathematics

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11th Grade

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Practice Problem

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Hard

Nguyễn Vinh

Used 12+ times

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10 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Câu 2: Mệnh đề nào sau đây là đúng ?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A. 3

MULTIPLE CHOICE QUESTION

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Câu 6: Trong các hàm số sau, hàm số nào đồng biến trên tập xác định của nó?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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