4 ms·
Count from 2 to infinity and 0 to -infinity and you will get the opposite result: you'll have an extra odd number, 1.
by greydius 11y ago
Count from 2 to infinity and 0 to -infinity and you will get the opposite result: you'll have an extra odd number, 1.
- alphabetam 11y agoThe function n -> n + 1 maps every even number into an odd, and it has an inverse (obviously n -> n - 1). Thus, the two sets have the same cardinality.
- bpicolo 11y agoInto a unique odd (which is key) : P