Question

quantos termos tem a pa (5, 10, 15 ...., 235)​

Answer 1

$> resolucao \\ \\ \geqslant progressao \: \: aritmetica \\ \\ r = a2 - a1 \\ r = 10 - 5 \\ r = 5 \\ \\ \\ an = a1 + (n - 1)r \\ 235 = 5 + (n - 1)5 \\ 235 = 5 + 5n - 5 \\ 235 = 5n \\ n = \frac{235}{5} \\ n = 47 \\ \\ \\ resposta \: > \: \: pa \: de \: 47 \: termos \\ \\ \geqslant \leqslant \geqslant \leqslant \geqslant \leqslant \geqslant \geqslant \geqslant$