題目 Problem (10 points) Find the following limits. (a) limx→2x+4x−7\lim_{x \to 2} \dfrac{x+4}{x-7}limx→2x−7x+4 (b) limx→0(1−7x)4x\lim_{x \to 0} (1-7x)^{\frac{4}{x}}limx→0(1−7x)x4 解答
