qual é o 38°termo da PA ( 2,5,8,... )?

0 ⤊

an = a1 + (n-1).r
a38 = 2 + (38-1).3
a38 = 2 + 37.3
a38 = 2 + 111
a38 = 113

2006-10-23 09:34:54 · answer #1 · answered by claudinei M 1 · 0⤊ 0⤋

se considerar 2 como primeiro termo, razao 3 -> 2, (2+3x1), (2+3x2),....
o 38° será igual a: (2+37x3) .

2006-10-23 09:42:41 · answer #2 · answered by pier_taranti 3 · 0⤊ 0⤋

113

2006-10-23 09:41:00 · answer #3 · answered by delicadinha31 1 · 0⤊ 0⤋

an=a1+r(n-1)
a38=2+3(38-1)
a38=2+3x37
a38=2+111
a38=113

abraço

2006-10-23 09:38:15 · answer #4 · answered by Anonymous · 0⤊ 0⤋

47 - 2 = 45

2006-10-23 09:27:36 · answer #5 · answered by BK ;) 5 · 0⤊ 0⤋