Simplify.
x^-2 - y^-2
--------------
x^-1 - y^-1
Maths!!F.3(Laws of Indices)!!
2009-09-16 4:39 am
回答 (1)
2009-09-16 4:55 am
收錄日期: 2021-04-23 20:39:05
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