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'*' is a binary operation defined on Q. Find which of the following binary oprations are associative and which are commutative : $(i) a*b=a-b\: for \: a,b \in Q (ii) a*b = \large\frac{ab}{4}$$\: for \: a,b \in Q.$
cbse
class12
modelpaper
2012
sec-b
q11
math
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asked
Jan 16, 2013
by
thanvigandhi_1
edited
Jul 22, 2013
by
sreemathi.v
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