Question

3^{2x + 1} = 243

Answer 1

\(3^{2x+1}=243\) 

\(3.3^{2x}=243\) 

\(3^{2x}=81\) 

\(9^x=81\) 

=> x=2 

Answer 2

3^2x+1 = 243

3^2x+1 = 3⁵

3^2x     = 3⁴

3^x       = 3²

=> x = 2

Answer 3

\(3^{2x+1}=243\)

\(\implies 3^{2x+1}=3^5\)

\(\implies 2x+1=5\)

\(\implies 2x=4\)

\(\implies x=2\)

Vậy x=2.

_Học tốt_

Answer 4

3^{2x + 1} = 243

=> 3^{2x + 1} = 3⁵

=> 2x + 1 = 5

=> 2x = 4

=> x = 2