Question

qual é o 60° termo da p.a (20,18...)​

Answer 1

$> \: resolucao \\ \\ \geqslant \: progressao \: \: aritmetica \\ \\ r = a2 - a1 \\ r = 18 - 20 \\ r = - 2 \\ \\ = = = = = = = = = = = = = = = \\ \\ > \: o \: 60 \: termo \: da \: pa \\ \\ an = a1 + (n - 1)r \\ an = 20 + (60 - 1) - 2 \\ an = 20 + 59 \times ( - 2) \\ an = 20 + ( - 118) \\ an = 20 - 118 \\ an = - 98 \\ \\ \\ \geqslant \leqslant \geqslant \leqslant \geqslant \leqslant \geqslant \leqslant \geqslant \geqslant$