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a*b =(a+b)/2
is this operation (*)commutative FOR ALL a and b in N??
(N-->set of natural nos.)
its commutative...but if a=7 , b=4 then a*b=11/2 which is not in N....
we say that a*b :NxN -->N....which means that outcome of the operation should be in N.....
but here its not...
in ncert its given that its commutative...
can u tell me where am i going wrong??
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Moderation Team
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