题目4单选题
设函数 <img src="https://tihai-oss-cloud.itihey.com/img/ab90404067c1f827c7593f5a0d976c65.gif">,则 <img src="https://tihai-oss-cloud.itihey.com/img/17fb0611b2529fb4b89932ddff63e0d7.gif">和 <img src="https://tihai-oss-cloud.itihey.com/img/2720fc8ea6630edb024dfd404375eb60.gif">分别是函数的A. 极大值,极大值B. 极小值,极小值C. 极大值,极小值D. 极小值,极大值