Question

o n-ésimo termo de uma sequencia é dada por;
an = 3n - 4
escreva os 5 primeiros termos dessa sequencia

Answer 1

$a_n = 3*n - 4 \\\\\\a_1 = 3*1 - 4 \to a_1 = 3 - 4 \to a_1 = -1\\\\ a_2 = 3*2 - 4 \to a_2 = 6 - 4 \to a_2 = 2\\\\ a_3= 3*3 - 4 \to a_3 = 9 - 4 \to a_3 = 5\\\\ a_4 = 3*4 - 4 \to a_4 =12 - 4 \to a_4 = 8\\\\ a_5 = 3*5 - 4 \to a_5 = 15 - 4 \to a_5 = 11\\\\\\ PA(-1, 2, 5, 8, 11)$