Question

64.4^x = 16⁸

Answer 1

64.4^x = 16⁸

=> 4³.4^x = (4²)⁸

=> 4^{x + 3} = 4^2.8

=> 4^{x + 3} = 4¹⁶

=> x + 3 = 16

=> x = 13

Vậy x = 13

Answer 2

64.4^x=16⁸

4³.4^x=(4²)⁸

4³.4^x=4¹⁶

4^3+x=4¹⁶

=> 3+x=16

          x=16-3

          x=13

vậy x=13

Answer 3

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Answer 4

\(64.4^x=16^8\)

\(\Rightarrow4^3.4^x=\left(4^2\right)^8\)

\(\Rightarrow4^{x+3}=4^{2.8}\)

\(\Rightarrow4^{x+3}=4^{16}\)

\(\Rightarrow x+3=16\)

\(\Leftrightarrow x=13\)

Vậy \(x=13\)