Question

numa PA, a17= 79 e a razao é8

Answer 1

Olá Rosa

PA

a17 = 79
r = 8

termo geral

an = a1 + r*(n - 1)

a17 = a1 + 8*16 

79 = a1 + 128

a1 = 79 - 128 = -49

PA(- 49,-41,-33,-25,-17,-9,-1,7,15,23,31,39,47,55,63,71,79)

.