Respostas

2014-05-11T18:25:04-03:00
a1=3\\ a6=30\\ \\ an=a1+(6-1)r\\ 30=3+(5)r\\ 30-3=5r\\ 27=5r\\ \frac { 27 }{ 5 } =r\quad ou\quad 5,4\\ \\ P.A=\{ 3\quad \_ \quad 8,4\quad \_ \quad 13,8\quad \_ \quad 19,2\quad \_ \quad 24,6\quad \_ \quad 30\}
1 4 1
obrigada flor!!
Por nada querida. :D