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，(,0)(),0.(0,)0,(,)(,)0,0;0,0;2==+==uxxxlutulthulttuauxltxtxx混合问题解：令，得：uxt=XxTt(,)()()=XxTtaXxTt()()()()2=−XaTX1T=2Xx()+Xx()=0TtaTt()+()=02=++XlTthXlTtxhultult()()()()(,)(,)=utXTt(0,)(0)()=0+=XlhXl()()0.，X(0)=0=+=XlhXlTt()()()0.)(=+=+=XXlhXlXX(0)()()00−=+−XxAeBexx(1)=0,()2Xx=()0=+XxAxB(2)=0,()Xx... 2024-05-200161.71 KB5页
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