不能設X=1/0
然後推出2X=2/0,3X=3/0;
因為X是不定式,對不定式的四則運算沒意義。
不能設X=1/0
然後推出2X=2/0,3X=3/0;
因為X是不定式,對不定式的四則運算沒意義。
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