2015 National Question 9 Fill-in-the-blank Differentiating 2015_退役省自主命题 (2015·理) 9.在 $(\sqrt{x}-1)^{4}$ 的展开式中, x 的系数为 $\_\_\_\_$。 Answer key6 ☆ SaveCan't do it, show the explanation查看原卷 →