Dada a progressão aritmética (8, 11, 14, 17, ...), determine:
a) razão
b) décimo termo
c) [tex] a_{14} [/tex]
d) termo geral
a) razão
b) décimo termo
c) [tex] a_{14} [/tex]
d) termo geral
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Verified answer
A)r=A2-A1
r=11-8
r=3
b)
A10=A1+(n-1)r
A10=8+(10-1)3
A10=8+9*3
A10=8+27
A10=35
c)
A14=A1+(n-1)r
A14=8+(14-1)3
A14=8+13*3
A14=8+39
A14=47
d)
An=A1+(n-1)r
An=8+(n-1)3
An=8+3n-3
An=3n+5