Respostas

2013-06-06T16:21:45-03:00

an=a1+(n - 1)*r

a23=1+(23-1)*6

a23=1+(22)*6

a23=1+132

a23=133

 

Resposta: 133

1 2 1
2013-06-06T16:46:02-03:00

an= a1 + (n-1) x r 

an = 1 +  ( 20 -1 ) x 6

an= 1 + 19 x 6 

an = 1 + 144 

an = 145