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We have seen how to multiply powers, now we shall see how to divide powers.



Notice that  

This is a general property, which we shall now prove.


Now cancel all the n a's in the denominator.

This means that the denominator becomes 1, and that the numerator has m-n a's (because n a's have been cancelled)



That is,


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1. 17a12 34a10 is





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