Question

Determine o
80º termo da P.A.
(-5,-2,1,4…)

Answer 1

Resposta:

Explicação passo a passo:

USANDO -> An = a1 + (n - 1) . R

1. An = -5 + (80 - 1) . 3
2. An = -5 + 79 . 3
3. An = -5 + 273
4. An = 232

Answer 2

$> \: resolucao \\ \\ \geqslant \: progressao \: \: aritmetica \\ \\ r = a2 - a1 \\ r = - 2 - ( - 5) \\ r = - 2 + 5 \\ r = 3 \\ \\ \\ \geqslant \: o \: 80 \: termo \: da \: pa \: \\ \\ an = a1 + (n - 1)r \\ an = - 5 + (80 - 1)3 \\ an = - 5 + 79 \times 3 \\ an = - 5 + 237 \\ an = 232 \\ \\ \\ \geqslant \leqslant \geqslant \leqslant \geqslant \leqslant \geqslant \leqslant \geqslant \geqslant \geqslant \geqslant$