Question

\(5.3^x=5.3^4\)

\(5.3^x=7.3^5-2:3^5\)

 

Answer 1

Answer 2

5.3^x = 5.3⁴

=> x = 4

 

5.3⁴ = 7.3⁵ - 2.3⁵

       = 3⁵ . (7 - 2)

       = 5. 3⁵

  => 3^x = 3⁵

=> x = 5

Answer 3

a) Ta có: \(5\cdot3^x=5\cdot3^4\)

\(\Leftrightarrow3^x=3^4\)

hay x=4

Answer 4

b) Ta có: \(5\cdot3^x=7\cdot3^5-2\cdot3^5\)

\(\Leftrightarrow5\cdot3^x=5\cdot3^5\)

hay x=5