(x+1)3>/x(x+4)(x-1)
>/ --->wieksze rowne
Kto mi moze to jakos wyjasnic?Wynik ma byc -2/7
(x+1)³≥x(x+4)(x-1)
x³ + 3x² + 3x + 1 ≥ x ( x² - x + 4x - 4 )
x³ + 3x² + 3x + 1 ≥ x³ + 3 x² - 4x
x³ - x³ + 3x² - 3x² + 3x + 4x + 1 ≥ 0
7x ≥ - 1 /:7
x ≥ -1/7
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(x+1)³≥x(x+4)(x-1)
x³ + 3x² + 3x + 1 ≥ x ( x² - x + 4x - 4 )
x³ + 3x² + 3x + 1 ≥ x³ + 3 x² - 4x
x³ - x³ + 3x² - 3x² + 3x + 4x + 1 ≥ 0
7x ≥ - 1 /:7
x ≥ -1/7