p>��2004-2005�M���Q)%:BQKhU6q��|J/�.ix��g�\1.8?2*9$H&5#9�'A#9+=(()26#)�(1)(8#)℄u=f�xy,yx�,f(·,·)�?~O��WYm#�(2)(8#)W,du=ln(x2+2y+5z2)��P(√2,−1,1)�"vk=(1,1,−1)�"v�d�(3)(10#)W�"�f(x+2y+3z,x2+y2+z2)=0Z���,dz=z(x,y)�O�d/Ym#�R��,df�?~O��2.;0D/()16#�Ewg8#)�(1)W,dy=√1−3x+x2−√1+2x−x3�x=0�9Æf=(a�x28�(2)��(0,1)�CÆL�f=(a�:,dz=x3−x2+xy+x−y.3.63�FCA1()18#�Eg9#)�(1)W+�(1,2,−1)/(−2,3,7)TP{��tx−1−1=y2=z+11�PG�(2)℄|a|=1,|b|=2,|c|=3,|a+b+c|=�17+6√3Ta⊥b,⟨a,c⟩=π/3,W⟨b,c⟩=?4..$"-(10#)�U6�r�^&,d�����yN-}�`��x→+∞�2s+���uC�&,d�D���,db��,d�%8oVwA�([*�{N�r�<(10#)���,df(x,y,z,w)=x·y·z·w�j51x+1y+1z+1w=1a,a>0,x>0,y>0,z>0,w>0r���w��W��&�w����I��ai>0(1≤i≤4)_��41a1+1a2+1a3+1a4≤4√a1·a2·a3·a4.6.7()10#):(1)(4#)℄�P(x,y,z)�XtS�F(x,y,z)=0,G(x,y,z)=0\�R�F/G�?~O��3+P�S�St\���!�b(X,Y,Z),U'�$St�"��(2)(6#)�IrBXtH�x−az−c,y−bz−c�=0,K�x−az−c,y−bz−c�=0�e�St�k+l�&���R�a,b,cn�d��,dH/K�?~O��7.E4<(10#)�℄,df(x)�[0,1]?~��()L8<��+�(0,f(0))�(1,f(1))��t�Xty=f(x)u7��(c,f(c)),0