Question

3(2x+1)^3=81

Answer 1

\(\Leftrightarrow2x+1=3\)

hay x=1

Answer 2

\(\left(2x+1\right)^3=27\)

\(\left(2x+1\right)=3\)

\(2x=2\)

\(x=1\)

Vậy \(x=1\)

Answer 3

(2x+1)³ =81:3

(2x+1)³ = 27

(2x+1)³ = 3³

=>2x+1=3

2x=4

=>x=2

nhớ tick cho anh nha

Answer 4

Em tham khảo cách làm:

\(3\left(2x+1\right)^3=81\\ \left(2x+1\right)^3=81:3\\ \left(2x+1\right)^3=27\\ =>\left(2x+1\right)^3=3^3\\ =>2x+1=3\\ 2x=3-1\\ 2x=2\\ x=2:2\\ x=1\)

Answer 5

hay x=1