Explicație pas cu pas:
24.
a) 6, 11, 16
[tex]\frac{6 - 1}{5} = \frac{5}{5} = 1 \\ \frac{11 - 1}{5} = \frac{10}{5} = 2 \\ \frac{16 - 1}{5} = \frac{15}{5} = 3[/tex]
b)
[tex] \frac{x - 1}{5} \ \ \vdots \ \ 5 \\\frac{x - 1}{5} = k \iff x - 1 = 5k \\ \implies x = 5k + 1 , unde \ \ k \in \mathbb{{N}^{\ast} }[/tex]
