题目内容
下列结论正确的是
2021-08-18
A.若，
B.若y=cos5x，则y′=-sin5x
C.若y=sinx2，则y′=2xcosx2
D.若y=xsin2x，则y′=-2xsin2x
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19254' and id < 1663719 and id<>'1663719' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19254' and id > 1663719 and id<>'1663719' order by id asc limit 5