Question

Answer 1

`@` `\text {Ans}`

`\downarrow`

`d)`

\(\dfrac{3^4\cdot3^n}{3^2}=3^7\)

`=> 3^4*3^n \div 3^2 = 3^7`

`=> 3^2*3^n = 3^7`

`=> 3^n = 3^7 \div 3^2`

`=> n=7-2`

`=> n=5`

Answer 2

Lời giải:

$\frac{3^4.3^n}{3^2}=3^7$

$\Rightarrow 3^{4+n-2}=3^7$

$\Rightarrow 3^{2+n}=3^7$

$\Rightarrow 2+n=7$

$\Rightarrow n=5$

Answer 3

\(\dfrac{3^4.3^n}{3^2}=3^7\)

\(\Rightarrow3^2.3^n=3^7\)

\(\Rightarrow3^{2+n}=3^7\)

\(\Rightarrow2+n=7\)

\(\Rightarrow n=7-2\)

\(\Rightarrow n=5\)