Question

Determine o 54° termo da P.A (30, 22, 14, 6...)

Answer 1

$> resolucao \\ \\ \geqslant progressao \: \: aritmetica \\ \\ r = a2 - a1 \\ r = 22 - 30 \\ r = - 8 \\ \\ \\ > \: o \: 54 \: termo \: da \: pa \\ \\ \\ an = a1 + (n - 1)r \\ an = 30 + (54 - 1) - 8 \\ an = 30 + 53 \times ( - 8) \\ an = 30 + ( - 424) \\ an = 30 - 424 \\ an = - 394 \\ \\ \\ \geqslant \leqslant \geqslant \leqslant \geqslant \leqslant \geqslant \leqslant \geqslant \geqslant \geqslant$