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Dani76561
@Dani76561
December 2019
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Forneça o intervalo de variação de P para que o ponto (-3,p) seja interno à circunferencia de equação x²+y²+2x-6y+5=0?
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albertrieben
Boa noite Dani
x² + y² + 2x - 6y + 5 = 0
substituçáo de x por -3 e y por p
9 + p
² - 6 - 6p + 5 = 0
p² - 6p + 8 = 0
delta
d² = 36 - 32 = 4
d = 2
p1 = (6 + 2)/2 = 8/2 = 4
p2 = (6 - 2)/2 = 4/2 = 2
2 < p < 4
4 votes
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x² + y² + 2x - 6y + 5 = 0
substituçáo de x por -3 e y por p
9 + p² - 6 - 6p + 5 = 0
p² - 6p + 8 = 0
delta
d² = 36 - 32 = 4
d = 2
p1 = (6 + 2)/2 = 8/2 = 4
p2 = (6 - 2)/2 = 4/2 = 2
2 < p < 4