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18.1

Exponents: Product rule $(a^x)(a^y)=a^{(x+y)}$

18.2

Exponents: Division rule ${a^x \over a^y}=a^{(x-y)}$

18.3

Exponents: Power rule $(a^x)^y = a^{(x\cdot y)}$

18.4

Exponents: Negative exponents

18.5

Exponents: Zero exponent: $a^0 = 1$

18.6

Exponents: Rational exponents

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