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Learn all about negative exponents. (It's normally a bad idea to hang around with negative people or do negative things, but it's totally cool to associate with negative exponents. They're surprisingly useful!)
Intuition on why a^-b = 1/(a^b) (and why a^0 =1)
Practice computing numbers raised to positive and negative integer exponents. Bases may be fractions.
Any non-zero number to the zero power equals one. Zero to any positive exponent equals zero. So, what happens when you have zero to the zero power?