例2.求函数y=(1+2x)(3x3-2x2)的导数 解:y=(1+2x)(3x3-2x2)+(1+2x)(3x3-2x2 2(3x3-2x2)+(1+2x)(9x2-4x) 24x3-3x24x结束 解 =24x 3−3x 2−4x 例2 求函数y=(1+2x)(3x 3−2x 2 )的导数 y=(1+2x)(3x 3−2x 2 )+(1+2x)(3x 3−2x 2 ) =2(3x 3−2x 2 )+(1+2x)(9x 2−4x)