Question

25 Ordonați descrescător numerele raționale a, b, c​

Answer 1

$a=3\cdot(4+\frac{7}{13}\cdot \frac{39}{7})-(\frac{19}{9}-\frac{1}{9})\\\\ a=3\cdot 7-2\\\\ a=19$

$b=16,2-[\frac{3}{2}-(\frac{4}{5}\cdot \frac{9}{4}+\frac{1}{5})+\frac{12}{9}\cdot \frac{3}{8} +\frac{1}{5}]\\\\ b=\frac{81}{5} -(\frac{3}{2} -2+\frac{1}{2} +\frac{1}{5})\\\\ b= \frac{81}{5}-\frac{1}{5}\\\\b=16$

$c=15-\frac{96}{31} \cdot(\frac{5}{16}+\frac{7}{12}\cdot \frac{4}{7})+2\\\\ c=15- \frac{96}{31} \cdot (\frac{5}{16}+\frac{1}{3})+2\\\\ c=15-\frac{30}{31}-\frac{32}{31}+2\\\\ c=15-2+2\\\\ c=15$

Le ordonam crescator:

a>b>c

19>16>15

Un alt exercitiu gasesti aici: https://brainly.ro/tema/172865

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