Question

6.Determinați ultima cifră a numerelor.

si 7​

Answer 1

Răspuns:

2^2017

ultima cifra (2^2017)

U =ultima cifra

U(2^1)=2 1

U(2^2)=4 2

U(2^3)=8 3

U(2^4)=6 4

U(2^5)=2

2017:4=504rest 1

U(2^ 2017)=U(2^1(1de la rest))=2