№1305. Будут ли взаимно обратные числа:

а)[tex]13[/tex] и [tex] \frac{1}{13} [/tex]

б)[tex] \frac{2}{9} [/tex] и [tex]4 \frac{1}{2} [/tex]

в)[tex]1 \frac{1}{7} [/tex] и [tex] \frac{7}{8} [/tex]

г) [tex] \frac{2}{3} [/tex] и [tex] 3 \frac{1}{2}?[/tex]
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