>>168
関連したもの
https://artofproblemsolving.com/community/c6h1484892p8689649
https://artofproblemsolving.com/community/c6h582856

a, b, c∈R、t≧0に対して、
(a^2+2)(b^2+2)(c^2+2) ≧ {(16√6)/9}*(a-b)(b-c)(c-a)
(a^2+t^2)(b^2+t^2)(c^2+t^2) ≧ {8t^3/(3√3)}*(a-b)(b-c)(c-a)