Question

 giúp em với ạ

Answer 1

\(3^{x-2015}=\dfrac{1}{243}\)

=>\(3^{x-2015}=3^{-5}\)

=>x-2015=-5

=>x=2010

Answer 2

\(3^{x-2015}=\dfrac{1}{243}=3^{-5}\\ Nên:x-2015=-5\\ Vậy:x=-5+2015=2010\)

Answer 3

`3^(x-2015)=1/243`

`=>3^(x-2015)=3^(-5)`

`=>x-2015=-5`

`=>x=-5+2015`

`=>x=2010`

Vậy `x=2010`

Answer 4

\(3^{x-2015}=\dfrac{1}{243}\)

\(\Rightarrow3^{x-2015}=1:3^5\)

\(\Rightarrow3^{x-2015}=3^{-5}\)

\(\Rightarrow x-2015=-5\)

\(\Rightarrow x=-5+2015\)

\(\Rightarrow x=2010\)

Vậy: \(x=2010\).