Question

Calculati ultima cifra a numerelor: 2 la puterea 2002; 3 la puterea 2003

Answer 1

2 la puterea  2002 = U( 2 la puterea 2002 ) = ( 2 la puterea 3 ) =
3 la 2003 = U( 3 la puterea 2003 ) = ( 3 la puterea 3 ) = 7

Answer 2

U(2 la puterea 2002=
U(2 la puterea 1)=2
U(2 la 2)=4
U(2 la 3)=8
U(2 la 4)=6...
2002÷4=500rest 2=>
U(2 la 2002)=4

U(3 la 2003)
U(3 la 1)=3
U(3 la 2)=9
U(3 la 3)=7
U(3 la 4)=1...
2003:4=500 rest 3=>
U(3 la 2003)=7