1 习题1—1 解答 1． 设yxxyyxf),(，求),(1),,(),1,1(),,(yxfyxxyfyxfyxf 解yxxyyxf),(；xxyyyxfyxyxxyfxyxyyxf222),(1;),(;1)1,1( 2． 设yxyxflnln),(，证明：),(),(),(),(),(vyfuyfvxfuxfuvxyf ),(),(),(),(lnlnlnlnlnlnlnln)ln)(lnln(ln)ln(...

时间:2025-02-22 11:34栏目:行业资料