• 2022-07-25
    设 [tex=9.643x1.357]vL3ToFMk/85qAMd4Wt/ebPks9Zbvsnkpk6T2SDjZV9M9Kn6TxYQ2UJTLJGbhEVEp[/tex] 其中 [tex=0.5x1.214]gNOHIx2AGu3qP//Yn7oxrg==[/tex] 具有二阶连续偏导数,求 [tex=2.429x2.714]RJakEEAq6IZY8uMTdSFcEFjQzxTnz4/jDu+kcdiia78iJZ0SeV8yp+UyBNZsXbfI[/tex]