I'll try: Integers: defined by k = (a, b), where "a - b = k" (a, b) = (c, d) if / because a + d = b + c example: (2, 5) = (4, 7) because 2 + 7 = 4 + 5 = 9 If k = (a, b), -k = (b, a) (5, 2) = 3 (2, 5) = -3 for two integers k = (a, b) and j = (c, d): k + j = (a + c), (b + d) (2, 1) + (6, 5) = (8, 6) 1 + 1 = 2
@eggmanx1007 ай бұрын
1+1は何故2なのか? 答え:そう決めたから
@piyashirikozo5 ай бұрын
現実には同じものは2つとしてないからな。自然界(現実)には、自然数は存在しない。
@TheLukeLsd3 ай бұрын
@@piyashirikozo Mas e dois elétrons ou dois prótons?
It's missing EN subtitles, but it's a famous formal definition of the summation notation (plus), so I kind of knew everything what's been shown without a translation.
@Yubin_Lee_Doramelin2 күн бұрын
The method they used in the proof of 1+1=2 is called "Peano's Axioms". I highly recommend to check it out in "Set Theory" textbooks, or on Wikipedia page if you don't have enough time.