Răspunsuri

Cel mai inteligent răspuns!
2014-05-11T00:13:32+03:00
Folosind formula:
 a^n-b^n=(a-b)(a^{n-1}+a^{n-2}b+...+ab^{n-2}+b^{n-1})
avem:

18^{64}-1=(18-1)(..................)\vdots17