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Silvania012
@Silvania012
January 2020
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Em uma p.a. a1 = 2 e a2 = 1/2.calcule a soma dos 20 primeiros termos dessa p.a
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Sarcastrophe
A1=2
r=-1,5
n=20
a20=2+(20-1)-1,5
a20=2+19.-1,5
a20=2-28,5
a20=-26,5
s20=[(2-26,5)20]/2
s20=[(-24,5)20]/2
s20=-490/2
s20=-245
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r=-1,5
n=20
a20=2+(20-1)-1,5
a20=2+19.-1,5
a20=2-28,5
a20=-26,5
s20=[(2-26,5)20]/2
s20=[(-24,5)20]/2
s20=-490/2
s20=-245