2013 Chongqing Question 3 Single-choice Differentiating 2013_省自主命题(重庆) 3.$\sqrt{(3-a)(a+6)}$($-6 \le a \le 3$)的最大值为 A. $9$B. $\dfrac{9}{2}$C. $3$D. $\dfrac{3\sqrt{2}}{2}$ Answer keyB ☆ SaveCan't do it, show the explanation查看原卷 →