除以零

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設被除數之除數Template:按爲零，或以零除除，可以 $\frac{a}{0}$ 表之， $a$ 爲被除數。假設 $a \neq 0$ ，任何數以零相乘，均等於零，故除以零之所得，未定義之值也。分類:數學

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