• 2022-06-08
    设[tex=0.5x1.0]wPh71/L+tm8emC/JD+8oZg==[/tex]二阶可导, [tex=0.5x1.214]gNOHIx2AGu3qP//Yn7oxrg==[/tex]具有二阶连续偏导数, [tex=7.786x1.357]fd6LoQAao/iFvI24VALBdaLNui0UE78FdlpqmRwOjgk=[/tex]求 [tex=3.357x2.714]RJakEEAq6IZY8uMTdSFcEFjQzxTnz4/jDu+kcdiia7//LTMvnADOFsvt760Q+0LY[/tex][input=type:blank,size:6][/input].