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AJUTORRRRRRRRRRRRRRRRRRRRRRRRRRRRRR!!! ​

AJUTORRRRRRRRRRRRRRRRRRRRRRRRRRRRRR class=

Răspuns :

a=9¹²-7¹²

restul impartirii lui a la 10 este ultima cifra a lui a

u(a)=u(9¹²-7¹²)

=u(9²-7⁴)

=u(1-1)

=0

deci, restul impartirii lui a la 10 este 0

=> a este divizibil cu 10.