Question

Resolva em R: x6-7x3-8=0

Answer 1

y = x³ ===> y² = x
x6 -7x 3 -8 = 0
y² - 7y - 8 = 0
y¹ = 8 e y'' = -1

y' = x³ = 8 = 2³
x'= 2

y'' = x = -1³
x'' = -1

x' + x'' = 2 + ( -1 ) = 1

Resposta 1