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欲證明(1) e∈H, and (2)ab∈H whenever a,b∈H. to claim that H is a subgroup. (1): let b=a ∈H then a^-1b=a^-1a=e∈H. (2): by (1) let b=e then a^-1∈H => If a, b ∈H, a^-1,b^-1∈H. Take c=a^-1, b=b∈H, since c^-1b∈H, [c...

請去你的信箱收信吧！ 請去你的信箱收信吧！ 請去你的信箱收信吧！

Their work has not been " emptied of previous vital meanings" and become a meaningless revival, as has so...

... mother hold me N.U.M.B I feel empty Of feeling, of feeling Even God is grieving...

...詞，所以以這格式和意思地說 The front row seats were left empty . 至於你的題目 The front row of seats 應該是"古老"英語文法結構，那便按"古老"的...

... attacked by the snowstorm The empty traffic of land is obstructed seriously Today...will be clearing up gradually. The airport of Amsterdam of Holland had ...

...the broken-hearted do I'm tired of talking to an empty space Of silences keeping me awake When you marry And...

Question4 Let H be a non- empty subset of the group G. Show that H is...isin;H Hence H is a subgroup of G ----------------------------------------- Question...