一、函数的和、差、积、商的求导法则

设函数u=u(x),v=v(x)都在点x处可导,那么u(x)±v(x),u(x)·v(x),(u(x))/(v(x))(v(x))≠0)都在点x处可导,且(1) [u(x)±v(x)]′=u′(x)±v′(x);(2) [u(x)·v(x)]′=u ′(x)·v(x)+u(x)·v′(x);(3) [Cu(x)]′=Cu′(x)(C是常数);(4).上述法则可用导数的定义来证明,此处略.和、差 ......（本文共 549 字 , 2 张图）     [阅读本文] >>