Question

DETERMINATI ultima cifra a numarului:
d)5203+6235+8429.

Answer 1

Explicație pas cu pas:

5203+6235=11.438

=11.438+8429=19.867

U7

Answer 2

Explicație pas cu pas:

$u( {5}^{203} + {6}^{235} + {8}^{429} ) =$

$= u( u({5}^{203}) + u({6}^{235}) + u({8}^{429}) )$

$= u( u(5) + u(6) + u({8}^{4 \cdot 107 + 1}) )$

$= u(5 + 6 + u( {( {8}^{4} )}^{107} \cdot 8) )$

$= u(11 + u(8) ) = u(11 + 8) = u(19)$

$= \bf 9$