Question

aratati ca următoarele numere sunt rationale ​

Answer 1

$c) \sqrt{2.25} = 1.5 \\ d) \sqrt{0.(11)} = \sqrt{ \frac{1 - 0}{9} } = \sqrt{ \frac{1}{9} } = \frac{1}{3} \\ e) \sqrt{5 \frac{4}{9} } = \sqrt{ \frac{5 \times 9 + 4}{9} } = \sqrt{ \frac{45 + 4}{9} } = \sqrt{ \frac{49}{9} } = \frac{7}{3} \\ f) \sqrt{1.36(1)} = \sqrt{ \frac{1361 - 136}{900} } = \sqrt{ \frac{1225}{900} } \frac{35}{30}$