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ÔN TẬP PTLG

Authored by Thao Lê

Mathematics

1st - 12th Grade

Used 1+ times

ÔN TẬP PTLG
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25 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Nghiệm của phương trình  cos2x=0\cos2x=0  là:

 x=π2+kπ,kZx=\frac{\pi}{2}+k\pi,k\in Z  

 x=π4+kπ2,kZx=\frac{\pi}{4}+\frac{k\pi}{2},k\in Z  

 x=π2+k2π,kZx=\frac{\pi}{2}+k2\pi,k\in Z  

 x=kπ,kZx=k\pi,k\in Z  

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Phương trình

 3tan2x3=0\sqrt{3}\tan2x-3=0  có các nghiệm là

 x=π6+kπ, kZx=\frac{\pi}{6}+k\pi,\ k\in Z  

 x=π3+kπ2, kZx=\frac{\pi}{3}+k\frac{\pi}{2},\ k\in Z  

 x=π3+kπ, kZx=\frac{\pi}{3}+k\pi,\ k\in Z  

 x=π6+kπ2, kZx=\frac{\pi}{6}+k\frac{\pi}{2},\ k\in Z  

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Nghiệm của phương trình cos2x=cos(π3x)\cos2x=\cos\left(\frac{\pi}{3}-x\right)  là

 x=π9+k2π3;x=\frac{\pi}{9}+\frac{k2\pi}{3};  


 x=π3+k2π,kZx=\frac{-\pi}{3}+k2\pi,k\in Z  

 x=π9+k2π;x=\frac{\pi}{9}+k2\pi;  


 x=π3+k2π,kZx=\frac{-\pi}{3}+k2\pi,k\in Z  

 x=π9+k2π3,kZx=\frac{-\pi}{9}+\frac{k2\pi}{3},k\in Z  

 x=π9+k2π3;x=\frac{\pi}{9}+\frac{k2\pi}{3};  

 x=π9+k2π3;x=\frac{\pi}{9}+\frac{k2\pi}{3};  


 x=2π3+k2π,kZx=\frac{2\pi}{3}+k2\pi,k\in Z  

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Phương trình  msinx+5cosx=13m\sin x+5\cos x=13    có nghiệm khi và chỉ khi

|m| ≤ 12

|m| ≥ 12

m ≥ 12

m ≤ - 12

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Giải phương trình 3sinxcosx+1=0\sqrt{3}\sin x-\cos x+1=0 

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6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

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7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tìm tập xác định của hàm số y=cotxsinx1y=\frac{\cot x}{\sin x-1}  

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D=R\  {π2+k2π,kπ}\ \left\{\frac{\pi}{2}+k2\pi,k\pi\right\}  

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