👤
a fost răspuns

determina n E N asfel incat (2n+3) (5n+12)

Răspuns :

2n+3|5n+12 |*2
2n+3|2n+3 |*5
_____________
2n+3| (10n+24)-(10n+15)
2n+3|10n+24-10n-15
2n+3|9
[tex]2n+3\in\{-9,-3,-1,1,3,9\} \\2n\in\{-12,-6,-4,-2,0,6\}\\ n\in\{-6,-3,-2,-1,0,3\}[/tex]
[tex]n\in N\\ n\in\{0,3\}[/tex]
este o solutie pentru clasa a 6-a

Alte intrebari