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d= 2-2/3
d= 1 1/3
d= 4/3
》Datos
n= 22
an= 2
d= 4/3
a= ?
》Fórmula
a= an-(n-1)d
a= 2 - (22-1) 4/3
a= 2 - (21)4/3
a= 2 - 28
a= -26
R= El primer término es -26