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(a^3-b^3)(a-b)>=3ab(a-b)^2 inequation

A inequation with variable

The solution

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/ 3    3\                         2
\a  - b /*(a - b) >= 3*a*b*(a - b) 
$$\left(a - b\right) \left(a^{3} - b^{3}\right) \geq 3 a b \left(a - b\right)^{2}$$
(a - b)*(a^3 - b^3) >= ((3*a)*b)*(a - b)^2