Question

3^{2x - 1}= 27  
Giúp e với ạ

Answer 1

\(3^{2x-1}=27\)

\(3^{2x-1}=3^3\)

\(2x-1=3\)

\(2x=3+1=4\)

\(x=\dfrac{4}{2}=2\)

Answer 2

3^2x-1=27

2x-1=27:3

2.x-1=9

2.x=9-1

2.x=8

x=8:2

x=4

vậy x =4

mong cho 1 vote và 5 sao

Answer 3

3^2x-1=27
3^2x-1=3^{3
2x-1=3
2x=3+1
2x=4
x=4:2
x=2
Vậy x = 2}

 

Answer 4

\(3^{2x-1}\)=27

\(\Rightarrow\)\(3^{2x}:3^1\)=27

\(3^{2x}\)=27:3

\(3^{2x}\)=9

\(\Rightarrow3^{2x}\)=\(3^2\)

\(\Rightarrow3^2.3^x\)=\(3^2\)

\(3^x\)=1