數學與統計 大學 3年以上以前

求解f題的解釋～不知道要怎麼去證明這是錯的 拜託拜託了🥺

(d) Suppose f(x) is continuous on [1, 2], then it is differentiable in (1, 2).. f(x)-8 (e) Suppose lim = 2, then lim f(x) = 8.. = X5 X-5 X+5 (f) The polynomialf (x) = x3 + 100x + 5 has at least one real root in R.. =