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LanyAndrade140
@LanyAndrade140
December 2019
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Dê o conjunto solução de cada uma das equações, sendo U=IR:
a) x²-13x=0
b) 2y²-y=0
c) x²+x=0
d) x³-5x²=0
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BeaMiranda
Evidência o x ou y em todas e iguala a 0 separado.
a) x² - 13x = 0
x(x - 13) = 0
x = 0 => x' = 0
x - 13 = 0 => x" = 13
b) 2y² - y = 0
y(2y - 1) = 0
y = 0 => y' = 0
y" => 1/2
2y - 1 = 0
2y = 1
y = 1/2
c) x² - x = 0
x(x - 1) = 0
x = 0 => x' = 0
x - 1 = 0 => x" = 1
d) x³ - 5x² = 0
x²(x - 5) = 0
x² = 0 => x' = 0
x - 5 = 0 => x" = 5
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Lista de comentários
a) x² - 13x = 0
x(x - 13) = 0
x = 0 => x' = 0
x - 13 = 0 => x" = 13
b) 2y² - y = 0
y(2y - 1) = 0
y = 0 => y' = 0
y" => 1/2
2y - 1 = 0
2y = 1
y = 1/2
c) x² - x = 0
x(x - 1) = 0
x = 0 => x' = 0
x - 1 = 0 => x" = 1
d) x³ - 5x² = 0
x²(x - 5) = 0
x² = 0 => x' = 0
x - 5 = 0 => x" = 5