8. Show that \( f(x) = x^3 + ax^2 + bx + c \) is an increasing function if \( a^2 \le 3b \).
阿摩線上測驗
登入
阿摩線上測驗
登入
8. Show that \( f(x) = x^3 + ax^2 + bx + c \) is an increasing function if \( a^2 \le 3b \).