Answer :
The exponential form of the expression is [tex](81)^{5/4}[/tex].
What is exponential form?
The exponential form is a way of writing numbers using bases and powers.
Exponential means becoming more and more rapid in growth. However, in mathematics, it represents a mathematical expression that has one or more exponents.
The given expression is;
[tex](\sqrt[4]{81} )^5[/tex]
The exponential form of the expression is determined in the following steps given below.
[tex]=(\sqrt[4]{81} )^5\\\\=(\sqrt[4]{3\times 3\times 3\times 3} )^5\\\\=(\sqrt[4]{3^4} )^5\\\\= (81)^{5/4}[/tex]
Hence, the exponential form of the expression is [tex](81)^{5/4}[/tex].
Learn more about exponent here;
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