Question

Determine o 32° termo da PA (15,11, 7,.....)

Answer 1

$> \: resolucao \\ \\ \geqslant \: progressao \: \: aritmetica \\ \\ r = a2 - a1 \\ r = 11 - 15 \\ r = - 4 \\ \\ = = = = = = = = = = = = = = = \\ \\ > \: o \: 32 \: termo \: da \: pa \\ \\ an = a1 + (n - 1)r \\ an = 15 + (32 - 1) - 4 \\ an = 15 + 31 \times ( - 4) \\ an = 15 + ( - 124) \\ an = 15 - 124 \\ an = - 109 \\ \\ \\ \geqslant \leqslant \geqslant \leqslant \geqslant \leqslant \geqslant \leqslant \geqslant$