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Convert the following expression to simplify faction or integer. If it is not a real number, enter None

Convert The Following Expression To Simplify Faction Or Integer If It Is Not A Real Number Enter None class=

Sagot :

Given an expression:

[tex]81^{-\frac{1}{4}}[/tex]

We have to simplify the given expression.

We know that:

[tex]x^{-a}=\frac{1}{x^a}[/tex]

So,

[tex]81^{-\frac{1}{4}}=\frac{1}{81^{\frac{1}{4}}}[/tex]

Let:

[tex]\begin{gathered} x=\frac{1}{81^{\frac{1}{4}}} \\ \Rightarrow x^4=(\frac{1}{81^{\frac{1}{4}}})^4 \\ \Rightarrow x^4=\frac{1}{81} \\ \Rightarrow x^4=(\frac{1}{3})^4 \\ \Rightarrow x=\frac{1}{3} \end{gathered}[/tex]

Thus, the answer is 1/3.