验证下列[tex=9.357x1.357]08kq+huHJLw5b4muUo6Ty8HDNRJQ4oBNkXnTeoXnjKo=[/tex]在整个xOy平面内是某一函数[tex=2.786x1.286]LG43B2QbxmDCTxdfGI/IqQ==[/tex]的全微分,并求这样的一个[tex=2.786x1.286]LG43B2QbxmDCTxdfGI/IqQ==[/tex]:[tex=16.786x1.571]EG3BfbbFwar1ofKhZwmfVeKdYX+SlaC0RgbB8HRgdEoXopB/VoAC4GSHyV/6HQI8Diq9freDt2ZtL2brS75Cswx6VrAutL1dSUgqA2rgOFl2fHo6A70OpCAcfnBiteeN[/tex]
验证下列[tex=9.357x1.357]08kq+huHJLw5b4muUo6Ty8HDNRJQ4oBNkXnTeoXnjKo=[/tex]在整个xOy平面内是某一函数[tex=2.786x1.286]LG43B2QbxmDCTxdfGI/IqQ==[/tex]的全微分,并求这样的一个[tex=2.786x1.286]LG43B2QbxmDCTxdfGI/IqQ==[/tex]:[tex=16.786x1.571]EG3BfbbFwar1ofKhZwmfVeKdYX+SlaC0RgbB8HRgdEoXopB/VoAC4GSHyV/6HQI8Diq9freDt2ZtL2brS75Cswx6VrAutL1dSUgqA2rgOFl2fHo6A70OpCAcfnBiteeN[/tex]
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