Which shows that associativty under addition?
a+b=b+a
a+(b+c)=(a+b)+c
a×(b×c)=(a×b)×c
a(b+c)=ab+bc
none of these
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(i) a + b = b + a is commutative property under addition.
(ii) (a + b) + c = a + (b + c) is associative property under addition.
(iii) a x (b + c) = a x b + a x c is distributive property of multiplication over addition.
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