Ciao, potete aiutarmi con questi esercizi, spiegando il procedimento? Grazie!
$A=\left\{\ldots,-\frac{7}{9},-\frac{6}{8},-\frac{5}{7},-\frac{4}{6},-\frac{3}{5},-\frac{2}{4},-\frac{1}{3}\right\} ; \quad$ c. $C=\left\{1, \frac{1}{8}, \frac{1}{27}, \frac{1}{64}, \frac{1}{125}, \frac{1}{216}\right\}$
$B=[0,5,10,15,20,25,30,35,40,45, \ldots] ;$
d. $D=\{1,4,7,10,13,16,19\}$