[tex] > resolucao \\ \\ \geqslant o \: 17 \: termo \: da \: pa \: (1.5.9...) \\ \\ r = a2 - a1 \\ r = 5 - 1 \\ r = 4 \\ \\ \\ an = a1 + (n - 1)r \\ an = 1 + (17 - 1)4 \\ an = 1 + 16 \times 4 \\ an = 1 + 64 \\ an = 65 \\ \\ \\ > < > < > < > < > < > < > < [/tex]