高数课程妥媒血课件 镭理工大理>> u(x+h)-u(xlv(x-u(xlv(x+h-v(x) h→ v(x+h)v(x)h u(+h)-u(x) ν(x+ v(r v(x)-u(x) =lim h→>0 v(x+hv(x) u(x)v(x-u(x)v(x Iv(x) f(x)在x处可导 Http://www.heut.edu.cnv x h v x h u x h u x v x u x v x h v x h ( ) ( ) [ ( ) ( )] ( ) ( )[ ( ) ( )] lim 0 + + − − + − = → ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) lim 0 v x h v x h v x h v x v x u x h u x h u x h + + −  −  + − = → 2 [ ( )] ( ) ( ) ( ) ( ) v x u x v x − u x v x =  f (x)在x处可导