Respostas

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  • Ambicioso
2013-12-02T11:00:18-02:00
R=a2-a1 .:. R=4-1 .:. R= 3
a15= a1 + 14R
a15= 1 + 14.3
a15 = 1+42
a15= 43
6 3 6
2013-12-02T11:05:37-02:00
An=a1+(n-1)*r
sendo: a1=1
n=15°
R=3
An= 1+(15-1)*3
An=1+(14)*3 
An= 1+42
An=43
2 5 2