Respuesta :
Answer: The expressions are written below.
Step-by-step explanation: We are given to write the given expressions using negative exponents.
We will be using the following property of exponents :
[tex]\dfrac{1}{p^h}=p^{-h}.[/tex]
The first expression is :
[tex]E_1=\dfrac{1}{(xy)^1}=(xy)^{-1}.[/tex]
The second expression is :
[tex]E_2=\dfrac{1}{a^4}=a^{-4}.[/tex]
The third expression is :
[tex]E_3=\dfrac{1}{8^6}=\dfrac{1}{2^{3\times6}}=\dfrac{1}{2^{18}}=2^{-18}.[/tex]
The fourth expression is :
[tex]E_4=\dfrac{5}{x^2}=5x^{-2}.[/tex]