Odpowiedź :
Wzór
[tex]a_n = a_1 + (n - 1) \times r[/tex]
Zatem
[tex]a_{30} = - 5 + (30 - 1) \times 2 \\ a_{30} = - 5 + 29 \times 2 \\ a_{30} = - 5 + 58 \\ a_{30} = 53[/tex]
Wzór
[tex]a_n = a_1 + (n - 1) \times r[/tex]
Zatem
[tex]a_{30} = - 5 + (30 - 1) \times 2 \\ a_{30} = - 5 + 29 \times 2 \\ a_{30} = - 5 + 58 \\ a_{30} = 53[/tex]