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Answer:
3
Explanation:
3x3x3x3 = 81
the factors of 81 are
81 = 9 × 9 = 3 × 3 × 3 × 3 ( that is 3 multiplied by itself 4 times ) , then
= 3
![\sqrt[4]{81}](https://img.qammunity.org/2024/formulas/mathematics/high-school/ovssz27hhe5y0au8iyfy655d6cr0odkgj5.png)
= 3