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pola 2=6 =10,100 : 6=
Pola 1= 3
Pola 2= 6
Berarti beda-nya 3
Dik: a=3 b=3
U10=a+9b=3+(9•3)=3+27=30
U100=a+99b=3+(99•3)=3+297=300
Un=a+(n-1)b=3+(n-1)•3=3+3n-3=3n