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volmirmarcos
@volmirmarcos
March 2022
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Qual é o números de termos da PA ( 9, 13, 17, ...149)?
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daisycastro
Verified answer
R = +4
a1 = 9
PA ( 9, 13 , 17, ... 149 )
an = a1 + ( n - 1) . r
149 = 9 + ( n - 1 ) . 4
149 = 9 + 4n - 4
149 - 9 + 4 = 4n
144 = 4n
4n = 144
n = 144/4
n = 36
Essa PA tem 36 termos
5 votes
Thanks 20
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Verified answer
R = +4a1 = 9
PA ( 9, 13 , 17, ... 149 )
an = a1 + ( n - 1) . r
149 = 9 + ( n - 1 ) . 4
149 = 9 + 4n - 4
149 - 9 + 4 = 4n
144 = 4n
4n = 144
n = 144/4
n = 36
Essa PA tem 36 termos