**What is exponents? An expression, also called "power," of repeated multiplication of the same factor. Example,****2**^{3}is a "power" with a base**2**and an exponent**3**. This is what it means mathematically "two multiply by itself three times."**How to read****a**^{n}**?**[Say it however you want!...] "**a**raised to the n-th power," "**a**raised to the power [of]**n,"**or possibly "**a**raised to the exponent [of]**n**," or more briefly: "**a**to the n-th power" or "**a**to the power [of]**n**," or even more briefly: "**a**to the**n**."**What is x**^{½}? A fractional "1/n" exponent means take the n-th root. So,**x**^{½ }means "square root of x;"is "cube root of x;"**x**^{1/3}is "n-th root of x;" and so on..**x**^{1/n}[of exponent multiplication]**Which models facilitate understanding of the concept****?****How is exponents useful?**

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