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Gleissonfidelis
@Gleissonfidelis
November 2019
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Determine o vigésimo termo da p.a (-8,-4,0,...)
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florzinha54
A¹=-8
n=20
r=4
a20=-8(20-1).4
a20=-8+19.4
a20=-8+76
a20=68
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Thanks 1
walterpradosamp
An = a1 + (n - 1) r pa (-8 ; -4 ; 0 ...)
a10 = -8 + (20 - 1) 4 a10 =? a1 = -4 n= 20 r= 4
a10 = -8 + 76
a10 = 68
{-8; -4; 0 ; 4; 8; 12; 16; 20; 24; 28; 32; 36; 40; 44; 48; 52; 56; 60; 64; 68}
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florzinha54
o vigésimo termo é 10?
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Lista de comentários
n=20
r=4
a20=-8(20-1).4
a20=-8+19.4
a20=-8+76
a20=68
a10 = -8 + (20 - 1) 4 a10 =? a1 = -4 n= 20 r= 4
a10 = -8 + 76
a10 = 68
{-8; -4; 0 ; 4; 8; 12; 16; 20; 24; 28; 32; 36; 40; 44; 48; 52; 56; 60; 64; 68}