Question

a . 2n=2560

3n=729

4n =256

2.2n=256

tìm n biết

Answer 1

* \(2n=2560\Leftrightarrow n=\dfrac{2560}{2}=1280\) vậy \(n=1280\)

* \(3n=729\Leftrightarrow n=\dfrac{729}{3}=243\) vậy \(n=243\)

* \(4n=256\Leftrightarrow n=\dfrac{256}{4}=64\) vậy \(n=64\)

* \(2.2n=256\Leftrightarrow n=\dfrac{256}{2.2}=\dfrac{256}{4}=64\) vậy \(n=64\)

Answer 2

\(2n=2560\Rightarrow n=1280\)

\(3n=729\Rightarrow n=243\)

\(4n=256\Rightarrow n=64\)

\(2.2n=256\Rightarrow n=64\)