x ^ 3 +10 > 0
更新1:
To hung 我都係咁答我呀sir, 但係佢話我個ans incomplete, 因為我冇mention 到 (x^2 - 10^1/3x + 10^2/3) 得出黎既 complex inequality . 如果我冇聽錯,佢好似係要我解釋埋(x^2 - 10^1/3x + 10^2/3) 得出黎既係 all positive 定係 all negative. 但係我又唔係好明佢究竟要我解釋d 咩......