Escreva o termo geral:
a) (1,2,3,4,5,6,...)
b) (2,3,4,5,6,...)
c) (3,6,9,12,15,18,...)
d) (2,5,8,11,14,17,...)
a) (1,2,3,4,5,6,...)
b) (2,3,4,5,6,...)
c) (3,6,9,12,15,18,...)
d) (2,5,8,11,14,17,...)
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Para achar a razão: r = a2 - a1
A)
An = 1 + (n - 1)1
An = 1 + n - 1
An = n
B)
An = 2 + (n - 1)1
An = 2 + n - 1
An = n + 1
C)
An = 3 + (n - 1)3
An = 3 + 3n - 3
An = 3n
D)
An = 2 + (n - 1)3
An = 2 + 3n - 3
An = 3n - 1