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Miruna214
a fost răspuns

0,4 <3n+2/20<7/10 n€N cu propietate

Răspuns :

Pix20

0,4<3n+[tex]\dfrac{2}{20}[/tex]<[tex]\dfrac{7}{10}[/tex]

[tex]\dfrac{2}{5}[/tex]<3n+[tex]\dfrac{1}{10}[/tex]<[tex]\dfrac{7}{10}[/tex]

[tex]\dfrac{2}{5}[/tex]-[tex]\dfrac{1}{10}[/tex]<3n<[tex]\dfrac{7}{10}[/tex]-[tex]\dfrac{1}{10}[/tex]

[tex]\dfrac{3}{10}[/tex]<3n<[tex]\dfrac{6}{10}[/tex]

[tex]\dfrac{3}{10}[/tex]·[tex]\dfrac{1}{3}[/tex]<n<[tex]\dfrac{6}{20}[/tex]·[tex]\dfrac{1}{3}[/tex]

[tex]\dfrac{1}{10}[/tex]<n< [tex]\dfrac{1}{10}[/tex]