求导法则:(ly)=v,(vm)y=1v+n,() uv-u 2 求导法则的推广 (atv)y=±y2±n, (uvw=u'vw+uv'w+uvw 特殊情况 (Cu)=Cu 例1y=2x3-5x2+3x-7,求y 解y=(2x3-5x2+3x-7)=(2x3)-(5x2y+(3x)-(7 2(x3)y-5(x2)+3(x) 23x2-52x+3=6x2-10x+3 首页上页返回 页结束铃首页 上页 返回 下页 结束 铃 •求导法则的推广 (uvw) =uvw (uvw) =uvw+uvw+uvw •特殊情况 (Cu) =Cu 例1 y=2x 3−5x 2+3x−7 求y =6x 2 =2·3x −10x+3 2−5·2x+3 =2(x 3 )−5(x 2 )+3(x) =(2x 3 )−(5x 2 解 y =(2x )+(3x)−(7) 3−5x 2+3x−7) (uv) =uv  (uv) =uv+uv  2 ( ) v u v uv v u  −  求导法则  =  下页