Question

1) Calcular o vigésimo termo da PA (3, 8, 13, 18, 23.)​

Answer 1

$> resolucao \\ \\ \geqslant progressao \: aritmetica \\ \\ r = a2 - a1 \\ r = 8 - 3 \\ r = 5 \\ \\ \\ \geqslant \: o \: 20 \: termo \: da \: pa \\ \\ an = a1 + (n - 1)r \\ an = 3 + (20 - 1)5 \\ an = 3 + 19 \times 5 \\ an = 3 + 95 \\ an = 98 \\ \\ \\ > < > < > < > < > < > < > < > > >$