Răspunsuri

2014-07-18T12:42:51+03:00
(3n+18)/(n+2) ∈N

(n+2)|(3n+18)
(n+2)|(n+2)   <=> (n+2)|3(n+2)  <=> (n+2)|(3n+6)

(n+2)|3n+18-3n-6

(n+2)|12  =>n+2={1;2;4;6;12}

1)n+2=1  => n= -1 ∉N

2)n+2=2 => n=0 

3)n+2=4  => n=2

4)n+2=6  =>n=4

5)n+2=12 =>n=10

n={0,2,4,10}
ce este cu bara aia ?
divide inseamna
ahams
n-ai pentru ce ;)