题目1单选题
函数<img src="https://tihai-oss-cloud.itihey.com/img/fb5a415c5ecb5846077880a9797254d1.png">的导数是( )A. <img src="https://tihai-oss-cloud.itihey.com/img/b66c0cf952fc59141794a7ec6fc504da.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/bd05879fa6509eef65665bb4de77d65e.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/cddcc4c8f12d5761833fd25437f82798.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/f3009534798f16cd3383a77bffce879c.png">