2016 Sichuan Question 6 Single-choice Differentiating 2016_省自主命题(四川) 6. 已知a 函数 $f ( x ) = x ^ { 3 } - 1 2 x$ 的极小值点,则 $a =$ A. -4B. -2C. 4D. 2 Answer keyD ☆ SaveCan't do it, show the explanation查看原卷 →