Toán 3

Toán 3

12th Grade - University

20 Qs

quiz-placeholder

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Toán 3

Toán 3

Assessment

Quiz

Fun

12th Grade - University

Practice Problem

Hard

Created by

Vân Luu

Used 114+ times

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Hàm số   z=ln(x-y+1)có miền xác định là miền 

x-y+1>0

x-y+1<0

x-y+1>=0

x-y+1<=0

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 z=x2+xy+y3z=x^2+xy+y^3  

 zx=2x+yz'_x=2x+y  

 zx=x2+x+3y2z'_x=x^2+x+3y^2  

 zx=2x+xz'_x=2x+x  

 zx=2x+y+3y2z'_x=2x+y+3y^2  

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 z=x4+y4+sin2yz=x^4+y^4+\sin^2y  

 zy=4y3+2sinyz'_y=4y^3+2\sin y  

 zy=4y3+2siny.cosyz'_y=4y^3+2\sin y.\cos y  

 zy=4x3+4y3+2sinyz'_y=4x^3+4y^3+2\sin y  

 zy=4x3+4y3+2sinyz'_y=4x^3+4y^3+2\sin y  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 z=x2+xy+y3z=x^2+xy+y^3  

 dz=(2x+y)dx+(x+3y2)dydz=\left(2x+y\right)dx+\left(x+3y^2\right)dy  

 dz=(2x+y)dx+(x+y3)dydz=\left(2x+y\right)dx+\left(x+y^3\right)dy  

 dz=(x2)dx+(y+3y2)dydz=\left(x^2\right)dx+\left(y+3y^2\right)dy  

 dz=(2x+y)+x+3y2dz=\left(2x+y\right)+x+3y^2  

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 z=x2+y3z=x^2+y^3  

 zx2=2z''_{x^2}=2  

 zx2=2+6yz''_{x^2}=2+6y   

 zx2=2+3yz''_{x^2}=2+3y  

 zx2=2x+3y2z''_{x^2}=2x+3y^2  

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 z=x2+xyz=x^2+xy  

 zxy=1z''_{xy}=1  

 zxy=2x+yz''_{xy}=2x+y  

 zxy=2+xz''_{xy}=2+x  

 zxy=2xz''_{xy}=2x  

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 z=xy+y5z=xy+y^5  

 zy2=20y3z''_{y^2}=20y^3  

 zy2=x+5y4z''_{y^2}=x+5y^4  

 zy2=y+5y4z''_{y^2}=y+5y^4  

 zy2=x+20y3z''_{y^2}=x+20y^3  

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