Răspuns :
Răspuns:
7/15:15/7=7/15·7/15=49/225 (F)
22/7·2=6+22/7=>44/7=42/7+22/7=>44/7≠64/7 (F)
19b/9=1=>b=9/19 (F)
9:18/5=1/5=>9·5/18=5/2 (F)
13/5 si 10/13 ,inversul lui 13/5 este5/13 (F)
Răspuns:
7/15:15/7=7/15·7/15=49/225 (F)
22/7·2=6+22/7=>44/7=42/7+22/7=>44/7≠64/7 (F)
19b/9=1=>b=9/19 (F)
9:18/5=1/5=>9·5/18=5/2 (F)
13/5 si 10/13 ,inversul lui 13/5 este5/13 (F)