Question

25 \(\le\) \(5^x\)<3125

Answer 1

\(25< 5^x< 3125\)

\(\Leftrightarrow5^2\le5^x< 5^5\)

\(\Leftrightarrow2\le x< 5\)

\(\Leftrightarrow x\in\left\{2;3;4\right\}\)

Vậy \(x\in\left\{2;3;4\right\}\) là giá trị cần tìm

Answer 2

\(25\le5^x< 3125\)

\(\Leftrightarrow5^2\le5^x< 5^5\)

\(\Rightarrow2\le x< 5\)

\(\Rightarrow x=\left\{2;3;4\right\}\)