Question

Valoarea expresiei(3/7)la puterea-2este:
a)3,7
b)9/49
c)-9/49
d)49/9

Answer 1

${( \frac{3}{7}) }^{ - 2} = {( \frac{7}{3}) }^{2} = \frac{ {7}^{2} }{ {3}^{2} } = \frac{49}{9} = 5 \frac{4}{9}$