In <img src="https://static.zxtiku.com/wangke/imgs/topic/a622dccac34fac3beb388b9b2597d725.png"/> ,C(<img src="https://static.zxtiku.com/wangke/imgs/topic/35cca6525a4d4093f055c30463129242.png"/> ) = <img src="https://static.zxtiku.com/wangke/imgs/topic/97ec0bb499e99dcebe3258fc8750ea9b.png"/> . ( )