bai tap phuong trinh mu

bai tap phuong trinh mu

12th Grade

10 Qs

quiz-placeholder

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bai tap phuong trinh mu

bai tap phuong trinh mu

Assessment

Quiz

Mathematics

12th Grade

Practice Problem

Hard

Created by

Tân Vũ

Used 320+ times

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Tìm nghiệm của phương trình .

 log9(x+1)=12\log_9\left(x+1\right)=\frac{1}{2}  

 x=2x=2  

 x=4x=-4  

 x=4x=4  

 x=72x=\frac{7}{2}  

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

x=3x=3

x=4x=4

x=7x=7

x=8x=8

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Media Image

 3x.3y=3x+y3^x.3^y=3^{x+y}  

 (5x)y=(5y)x\left(5^x\right)^y=\left(5^y\right)^x  

 4xy=4x4y4^{\frac{x}{y}}=\frac{4^x}{4^y}  

 (2.7)x=2x.7x\left(2.7\right)^x=2^x.7^x  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

P=x1915P=x^{\frac{19}{15}}

P=x196P=x^{\frac{19}{6}}

P=x16P=x^{\frac{1}{6}}

P=x115P=x^{-\frac{1}{15}}

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Tìm tập nghiệm của phương trình

 log3(2x2+x+3)=1\log_3\left(2x^2+x+3\right)=1  

 {0;12}\left\{0;-\frac{1}{2}\right\}  

 {0}\left\{0\right\}  

 {12}\left\{-\frac{1}{2}\right\}  

 {0;12}\left\{0;\frac{1}{2}\right\}  

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Nghiệm của phương trình  9x10.3x+9=09^x-10.3^x+9=0  là

 x=1; x=2x=1;\ x=2  

 x=9; x=1x=9;\ x=1  

 x=3;x=0x=3;x=0  

 x=2; x=0x=2;\ x=0  

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Cho phương trình  25x+126.5x+1=0.25^{x+1}-26.5^x+1=0.  Đặt  t=5x, t>0t=5^x,\ t>0  
 thì phương trình trở thành


 t226t+1=0t^2-26t+1=0  

 25t226t=025t^2-26t=0  

 25t226t+1=025t^2-26t+1=0  

 t226t=0t^2-26t=0  

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