Question

DETERMINA ULTIMA CIFRA A NUMARULUI 3 LA PUTEREA 9 +2 LA PUTERE9+5 LA PUTEREA 9

Answer 1

$u = {3}^{9} =$

${3}^{1} = 3 \\ {3}^{2} = 9 \\ \ \\ {3}^{3} = 27 \\ {3}^{4} = 81 \\ {3}^{5} = ...3$

9:4= 2 rest 1

u= 3

u2^9= 2

u5^9=5

3+2+5=10 rezulta ultima cifra =0