求方程所確定的隱函數(shù)z=z(x,y)的偏導(dǎo)數(shù):x3+y3+z3-3xyz=0
求方程所確定的隱函數(shù)z=z(x,y)的偏導(dǎo)數(shù):cos2x+cos2y+cos2z=1