Answers

2016-04-08T01:49:42+05:30
False because A is not divisible by -1.
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2016-04-08T09:49:13+05:30
True,
a/1=a. [for example, operation of one :
1*1=1,
a*1=a,
a/1=1,
1/1=1]
ie, a/(-1)= -a.
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