LŨY THỪA - LOGARIT

LŨY THỪA - LOGARIT

University

15 Qs

quiz-placeholder

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LŨY THỪA - LOGARIT

LŨY THỪA - LOGARIT

Assessment

Quiz

Mathematics

University

Practice Problem

Hard

Created by

Huy Nguyễn

Used 60+ times

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15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tính

 log216\log_216  

3

4

6

5

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tính

 4log234^{\log_23}  

6

3

9

27

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tập xác định của hàm số

 y=(1x)13y=\left(1-x\right)^{\frac{-1}{3}}  là:

 [1;+]\left[1;+\infty\right]  

 (;1)\left(-\infty;1\right)  

  (;1)(1;+)\ \left(-\infty;1\right)\cup\left(1;+\infty\right)  

 (;1]\left(-\infty;1\right]  

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Điều kiện xác định của

 y=(x2x2)2y=\left(x^2-x-2\right)^{-2}   là:

 x2x\ge2  hoặc  x1x\le-1  

 x1; 2x\ne-1;\ 2  

 x>2x>2  hoặc  x<1x<-1  

Xác định với mọi  xRx\in R  

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tính đạo hàm của hàm số

 y=(5x)3y=\left(5-x\right)^{\sqrt{3}}  

 y=(5x)31y'=\left(5-x\right)^{\sqrt{3}-1}  

 y=(5x)31y'=-\left(5-x\right)^{\sqrt{3}-1}  

 y=3(5x)3+1y'=-\sqrt{3}\left(5-x\right)^{\sqrt{3}+1}  

 y=3(5x)31y'=-\sqrt{3}\left(5-x\right)^{\sqrt{3}-1}  

6.

MULTIPLE SELECT QUESTION

1 min • 1 pt

Những công thức nào sau đây đúng, giả thiết  0<a1; b, b1, b2>00<a\ne1;\ b,\ b_1,\ b_2>0  ?

 loga(aα)=α\log_a\left(a^{\alpha}\right)=\alpha  

 loga(b1+b2)=logab1.logab2\log_a\left(b_1+b_2\right)=\log_ab_1.\log_ab_2  

 logaa=1\log_aa=1  

 logab=1logba\log_ab=\frac{1}{\log_ba}  

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Đẳng thức nào sau đây đúng?

log2417=27\log_24^{\frac{1}{7}}=\frac{2}{7}

log52512=12\log_525^{\frac{1}{2}}=\frac{1}{2}

log53=2log35\log_5\sqrt{3}=2\log_35

log1213=log23\log_{\frac{1}{2}}\frac{1}{3}=-\log_23

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