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Scrieti toate fractiile de forma a supra b, unde a si b sunt numere prime distincte cuprinse intre 16 si 25

Răspuns :

[tex] \frac{17}{19} , \frac{17}{23}, \frac{19}{17}, \frac{19}{23}, \frac{23}{17}, \frac{23}{19} [/tex]
17pe19,17pe23,19pe17,19pe23,23pe17,23pe19....................