The given expression is needed to be written in the the form [tex]y^n[/tex]
The required expression is [tex]y^{-\dfrac{5}{4}}[/tex]
The given expression is
[tex]\dfrac{1}{y^{\dfrac{5}{4}}}[/tex]
We know the identity that a negative exponent means the reciprocal.
[tex]\dfrac{1}{a^b}=a^{-b}[/tex]
So, the given expression is
[tex]\dfrac{1}{y^{\dfrac{5}{4}}}=y^{-\dfrac{5}{4}}[/tex]
The required expression is [tex]y^{-\dfrac{5}{4}}[/tex]
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