dos trintas primeiros termos da PA (4,10,...)
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an= a1+(n-1)r
X=4+(30-1).6
X= 4+(29.6)
X= 4+ 174
X= 178
(4, 10, 16, 22, 28, 34, 40, 46, 52, 58, 64, 70, 76, 82, 88, 94, 100, 106, 112, 118, 124, 130, 136, 142, 148, 154, 160, 166, 172, 178...)
X=4+(30-1).6
X= 4+(29.6)
X= 4+ 174
X= 178
(4, 10, 16, 22, 28, 34, 40, 46, 52, 58, 64, 70, 76, 82, 88, 94, 100, 106, 112, 118, 124, 130, 136, 142, 148, 154, 160, 166, 172, 178...)
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