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Bài kiểm tra giữa kỳ

University

20 Qs

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Assessment

Quiz

Mathematics

University

Practice Problem

Medium

Created by

Tuệ Minh Phạm

Used 7+ times

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Hàm hai biến f(x,y)=x+y2+yf\left(x,y\right)=\frac{x+y}{2+y}  . Tính  df(1;1)df\left(1;1\right)  

 19(dx+dy)\frac{1}{9}\left(-dx+dy\right)  

 19(3dxdy)\frac{1}{9}\left(3dx-dy\right)  

 13(2dx+dy)\frac{1}{3}\left(-2dx+dy\right)  

 19(3dx+dy)\frac{1}{9}\left(3dx+dy\right)  

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tính giới hạn hàm số limxy sinxx\lim_{x\rightarrow y}\ \frac{\sin x}{x}  


1

-1

0

 \infty  

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tính giới hạn hàm số : limx0sin5xtan7x\lim_{x\rightarrow0}\frac{\sin5x}{\tan7x}  


1

0

 57\frac{5}{7}  

 \infty  

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Tính giới hạn hàm số sau : limx0ln(1+3x2)(1cos5x)sinx\lim_{x\rightarrow0}\frac{\ln\left(1+3x^2\right)}{\left(1-\cos5x\right)\sin x}  

1

 35\frac{3}{5}  

 \infty  

 625\frac{6}{25}  

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Tính giới hạn các hàm số sau : limx0tanxxx3\lim_{x\rightarrow0}\frac{\tan x-x}{x^3}  

1

 13\frac{1}{3}  

0

 \infty  

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tính các dạo hàm riêng theo biến x của hàm số sau: z=x3y+sin2yz=x^{3y+\sin2y}  


 zx=(3y+sin2y).x3y+sin2yz'_x=\left(3y+\sin2y\right).x^{3y+\sin2y}  

 zx=(3+2 cos2y)x3y+sin2y.lnxz'_x=\left(3+2\ \cos2y\right)x^{3y+\sin2y}.\ln x  

 zx=x3y+sin2yz'_x=x^{3y+\sin2y}  

 zx=(3+2 sin2y)x3y+sin2yz'_x=\left(3+2\ \sin2y\right)x^{3y+\sin2y}  

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Cho f(x,y,z)=x2y+y2x+z2x+2zf\left(x,y,z\right)=x^2y+y^2x+z^2x+2^z  . Tính  fz(1;2;1)\frac{\partial f}{\partial z}\left(1;\sqrt{2};-1\right)  

 ln22\frac{\ln2}{2}  

0

 ln22+2\frac{\ln2}{2}+2  

 ln222\frac{\ln2}{2}-2^{ }  

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