Răspuns:
Explicație pas cu pas:
3 / 4 < 5 / n => 0 < n < 7 ⇒ n = 1; 2; 3; 4; 5; 6
3 / 4 < 5 / 1 √
3 / 4 < 5 / 2 ( 2 intregi si 1 / 2)
3 / 4 < 5/ 3 ( 1 intreg si 2 / 3 )
3 / 4 < 5 / 4 ( 1 intreg si 1 / 4)
3 / 4 < 5 / 5 ( 1 intreg ) √
3 / 4 < 5 / 6 ⇔ 9 / 12 < 10 / 12 √
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n ≠7; 3 / 4 > 5 / 7⇔ 21 / 28 > 20 / 28