题目1单选题
函数 <img src="https://tihai-oss-cloud.itihey.com/img/78b393d12545bd851ec92dfc5bbb39d7.png"> 的导数为( )A. <img src="https://tihai-oss-cloud.itihey.com/img/eb9ff4da5aa6cc47db2dacd2e54a011a.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/b8fc8641b970eeb14ec39eb72473c8a7.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/d49ab67ebfd4027f385b2203e56f9240.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/d7a17f2167efb5fcca7a802b932cc7dd.png">