Respostas

2014-08-24T14:03:35-03:00
An=a₁+(n-1)r
a₂=7+(2-1)4
a₂=7+1·4⇒a₂=11
a₃=7+(3-1)4
a₃=7+2·4⇒a₃=15
a₄=7+(4-1)4
a₄=7+3·4⇒a₄=19
a₅=7+(5-1)4
a₅=7+4·4⇒a₅=23
a₆=7+(6-1)4
a₆=7+5·4⇒a₆=27

a₁=7,a₂=11,a₃=15,a₄=19,a₅=23,a₆=27
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