设函数[tex=4.643x1.286]TGQ8DDwZkRJy84P4eK/Pyg==[/tex]具有二阶连续偏导数，且满足等式[tex=12.143x2.357]3IcVdMaEshIpVUw5oTSMWorXDt4A5bD4agvJhU4CEam/YMx7DJC2T269B/fadt9YrsvdMbsoytOZvIqR2ui0sborcCk1nmWgBRsnwXzFj076A70630lRvx5HHmQs7REv/lveAZTlkKN/0EwrpT+Ndw==[/tex]。确定[tex=1.429x1.286]+fmtub6g+tF54Tl5ap2zBg==[/tex]的值，使等式在变换[tex=4.571x1.286]JZM15ajSD0Ddoy03W6APaw==[/tex]，[tex=4.5x1.286]/UG21BDJYyCTNmUjUU31Hg==[/tex]下简化为[tex=4.143x2.357]SWp666GLC1oRMIpERtA626dsS1zxDGFsP9Waza/dLIb8y9UiUDR/zKFF0IWjA18dVcY8lyfLu0vVCC81LM3NLQ==[/tex]。（本题满分11分）
设函数[tex=4.643x1.286]TGQ8DDwZkRJy84P4eK/Pyg==[/tex]具有二阶连续偏导数，且满足等式[tex=12.143x2.357]3IcVdMaEshIpVUw5oTSMWorXDt4A5bD4agvJhU4CEam/YMx7DJC2T269B/fadt9YrsvdMbsoytOZvIqR2ui0sborcCk1nmWgBRsnwXzFj076A70630lRvx5HHmQs7REv/lveAZTlkKN/0EwrpT+Ndw==[/tex]。确定[tex=1.429x1.286]+fmtub6g+tF54Tl5ap2zBg==[/tex]的值，使等式在变换[tex=4.571x1.286]JZM15ajSD0Ddoy03W6APaw==[/tex]，[tex=4.5x1.286]/UG21BDJYyCTNmUjUU31Hg==[/tex]下简化为[tex=4.143x2.357]SWp666GLC1oRMIpERtA626dsS1zxDGFsP9Waza/dLIb8y9UiUDR/zKFF0IWjA18dVcY8lyfLu0vVCC81LM3NLQ==[/tex]。（本题满分11分）
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