Pure math
本帖最後由 intergration 於 13-6-2011 21:55 編輯1 a. Prove that a+b=b+a for any real nember a and b
b. Prove that 1+2=3
Hence,prove that 2+1=3
2 a. Prove that ab=ba for any real nember a and b
bProve that (1)(2)=2
Hence,prove that (2)(1)=2
HKALE Pure math 2013
just joking.. 好高深…
簡直唔係pure應該係大學以上既數 施主,相信2013年的pure要在大學才再到 聽講1+1=2係要用1d高深既logic用set theory去prove Honestly there's not much to prove
Axioms of real numbers states that addition and multiplication are commutative
so a+b=b+a and ab=ba for all a,b real
also 1 is the identity of multiplication so by the axiom 1(2)=(2)(1)=2
prove 1+2=3 depends how much you can assume on the real number system
hell this is more like a philosophical question than an analysis question -,-
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