<img src="https://static.zxtiku.com/wangke/imgs/topic/f31fa61e1599ab657ead808ef55d300a.jpg"/>,求常数<img src="https://static.zxtiku.com/wangke/imgs/topic/107242b3cc2e1ec8fc5ca3f66f59f98e.jpg"/>的值( ). A. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/715cbb11a85317fd98073c0b29d6f0b2.jpg"/> B. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/8591e1f03f4fccf9176d86207037d0a6.jpg"/> C. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/36239e9072f19093ed7e1917de6eef5c.jpg"/> D. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/4dbdd1792e2875ab14e4f6bdbaedbd8a.jpg"/>