Question

Arătați ca(1 supra 2-2 supra 3+ 3 supra 4 ) :14 supra 12= 1supra 2​

Answer 1

Răspuns:

$(\frac{1}{2} - \frac{2}{3} + \frac{3}{4}) \div \frac{14}{12} = \\ nc = 12 \\ ( \frac{6 - 8 + 9}{12} ) \div \frac{14}{12} = \\ \frac{7}{12} \div \frac{14}{12} = \\ \frac{7}{12} \times \frac{12}{14} = \\ \frac{84}{168} = \frac{1}{2}$