numa pa a4= 12 e a9=27. calcule a3?

2007-07-11 06:36:49 · 3 respostas · perguntado por Anonymous em Ciências e Matemática ➔ Matemática

a9 = a4 + (9 4)r = a4 + 5r, logo

27 = 12 + 5r => r = 3.

a3 = a4 - r = 12 - 3 = 9

2007-07-11 07:58:23 · answer #1 · answered by Steiner 7 · 0⤊ 1⤋

a3=9

2007-07-11 13:49:41 · answer #2 · answered by Caroliner 1 · 0⤊ 0⤋

a3= 3x3=9

2007-07-11 13:52:28 · answer #3 · answered by edmilson d 5 · 0⤊ 1⤋

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