(4) Symbol: The fourth power root of a positive number is a positive number, and the fourth power root of a negative number is a complex number.3. The properties of the fourth power root:
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2. The fourth root is the number that gets the original number after multiplying a number by itself three times. The fourth-power root is commonly used in fields such as mathematics, physics, and engineering.
(2) Negative numbers: Negative numbers also have four power roots, but they are complex numbers. For example, the fourth power root of -16 is 2i and -2i because (2i)⁴ = -16;
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