English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
Todas as categorias

2 respostas

an = a1+(n-1)*r
a16 = 0 + (16-1)*2 = 30

Sn = n(a1+an) / 2
S16 = 16(0+30)/2 = 240

2007-03-28 08:44:07 · answer #1 · answered by Spy7 3 · 0 0

a1 = 0
a2 = 2
r = 2
n = 16
an =

an = a1 + (16-1)2
an = 0 + (16 - 1)2
an = 0 + 30
an = 30

Sn = (an + a1) *n/2
Sn = (30 + 0) * 16/2
Sn = 30*16/2
Sn = 30*8
Sn = 240
Resposta: Soma é igual a 240.
<><>

2007-03-28 22:25:15 · answer #2 · answered by aeiou 7 · 0 0

fedest.com, questions and answers