⅓log(x³+26) = log(x+2)
C.E.
x³ > -26. x>∛-26. x>-2. x>-2
log(x³+26)^⅓ = log(x+2)
∛(x³+26) = x+2
x³ + 26 = x³ + 6x² + 12x + 8
3 = x² + 2x
x² + 2x - 3 = 0
x = -1 ± √(4+12) / 2
x = -1 ± 2. x₁ = 1. x₂ = -3.
per le C.E. solo x₁ = 1 è valida
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