December 2018 1 90 Report
Potęgi

a)
 \frac{a^{-5}*b^{-4} }{ x^{5}* y^{-4}} :\frac{a^{-8}*x^{-3} }{ b^{4}* y^{5}}

b)
 a^{-3} *b^{-4} :( a^{-2} * b^{-3} )

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