Respostas
respondido por:
31
a1 = 1
an = 37
n = 11+2 ==> 13
1 + 12r = 37
12r = 37-1
12n = 36
r = 3
(1,4,7,10,13,16,19,22,25,28,31,34,37 )
respondido por:
14
an = a1 + ( n -1) * r
37 = 1 + ( 13 -1) * r
37 = 1 + 12r
36 = 12r
r = 36/12
r = 3
=========
n an = a1 + ( n -1) * r an
1 an = 1 + ( 1 -1) * 3 1
2 an = 1 + ( 2 -1) * 3 4
3 an = 1 + ( 3 -1) * 3 7
4 an = 1 + ( 4 -1) * 3 10
5 an = 1 + ( 5 -1) * 3 13
6 an = 1 + ( 6 -1) * 3 16
7 an = 1 + ( 7 -1) * 3 19
8 an = 1 + ( 8 -1) * 3 22
9 an = 1 + ( 9 -1) * 3 25
10 an = 1 + ( 10 -1) * 3 28
11 an = 1 + ( 11 -1) * 3 31
12 an = 1 + ( 12 -1) * 3 34
13 an = 1 + ( 13 -1) * 3 37
PA = { 1, 4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37 }
37 = 1 + ( 13 -1) * r
37 = 1 + 12r
36 = 12r
r = 36/12
r = 3
=========
n an = a1 + ( n -1) * r an
1 an = 1 + ( 1 -1) * 3 1
2 an = 1 + ( 2 -1) * 3 4
3 an = 1 + ( 3 -1) * 3 7
4 an = 1 + ( 4 -1) * 3 10
5 an = 1 + ( 5 -1) * 3 13
6 an = 1 + ( 6 -1) * 3 16
7 an = 1 + ( 7 -1) * 3 19
8 an = 1 + ( 8 -1) * 3 22
9 an = 1 + ( 9 -1) * 3 25
10 an = 1 + ( 10 -1) * 3 28
11 an = 1 + ( 11 -1) * 3 31
12 an = 1 + ( 12 -1) * 3 34
13 an = 1 + ( 13 -1) * 3 37
PA = { 1, 4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37 }
Helvio:
De nada.
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