Question

Tìm số tự nhiên n biết rằng:  (2n - 1)⁴ : (2n - 1)= 27.

Answer 1

\(\left(2n-1\right)^4:\left(2n-1\right)=27\)

\(\left(2n-1\right)^3=3^3\)

\(\Rightarrow2n-1=3\)

\(\Rightarrow2n=3+1\)

\(\Rightarrow2n=4\)

\(\Rightarrow n=4:2\)

\(\Rightarrow n=2\)

Answer 2

 

(2n - 1)⁴ : (2n - 1)= 27.

(2n-1)³=27

(2n-1)³=3³

=>2n-1=3

2n=4

x=2

Vậy n=2       

Answer 3

nói cai j chả hỉu