8/15 < 4/2n +1 < sau = 2/3

Răspunsul a fost dat de: USER4217
28 Agustus 2025 matematica 5 minute
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Clasă: Education Materie: matematica
8/15 < 4/2n +1 < sau = 2/3
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inversam fractiile

3/2≤ 2n+1/4 < 15/8  
12/8 ≤ 4n+2 < 15/8
12≤ 4n+2 <15 /-2
10 ≤ 4n < 13  /:4
10/4 ≤ n < 13/4
daca n∈ R ⇒ n∈ [5/2 ; 13/4)
Răspunsul a fost dat în data 28 Agustus 2025

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