一道大一上高数题.设f(x)是有二阶连续偏导数,f(0)=0,f'(0)=1.且积分∫L[xy(x+y)-f(x)y]dx+[f'(x)+x2y]dy与路径无关求f(x)∫L是线积分.x2y是x方乘以y即x^2*y

　　一道大一上高数题.

　　设f(x)是有二阶连续偏导数,f(0)=0,f'(0)=1.且积分∫L[xy(x+y)-f(x)y]dx+[f'(x)+x2y]dy与路径无关求f(x)

　　∫L是线积分.x2y是x方乘以y即x^2*y