Here are the key terms along with their definitions based on your provided information:
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Exponent: A small raised number that indicates how many times to multiply the base number by itself.
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Base: The number in exponential form that is multiplied by itself.
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Radical: The symbol (√) is used to indicate a square root, while the symbol for nth roots is often written as 'v'.
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Exponential expression: An expression that involves an exponent, which may contain variables as either the base or the exponent.
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Principal square root: The positive square root of a number.
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Fractional: Having to do with a fraction.
In addition, the keywords "power," "exponent," "exponential expression," "base," "radical," and "principal square root" are related to the concepts described above.