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

Lessons

• 1.
  prove: ${8^5 \over 8^2} = 8^{5-2} = 8^3$

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• 2.
  simplify: ${100a^{16}b^3c^7 \over 2a^4c^8}$

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