第八周作业选讲√.pdfVIP免费

P25B1、3141700123lg2020D[1,0)(0,1)(1,2)(2,3)(3,7]xxxxxx、、、P74A13、232233232223333lim4,3lim=lim340=03lim=9+3a9+3a0,939393limlimlimlim3633364,2,xxxxxxxxxaxbaxxaxbxaxbxxxaxbbbbaxaxxaxbxaxaxaaxxxaab求、b解：3P75A27(3)、2220002221111222111(1)(1)(1)1limlimlimsin(1)(1)(1)(1)2limlimlimlimsinsin(1)(1)(1)limlimlimx,sinsinxxxxxxxxxxxxxxxxxxxxxkkZxxxxxxxxxxxxxxxx间断点：12k(1)2lim(1)01limsin01xxxxxxkx当、时，所以，、是可去间断点，而其它整数为无穷型间断点。P77B11、看这题00lim000a0bxxbxbxbaebae另外，由于，P105A7'00'00'()(0)ln(1)f(0)limlim1()(0)f(0)limlim1(0)1hhhhfhfhhhfhfhhhfP106A15(4)、()''()()'()()'''()'()()xfxxfxxfxxxfxxfxxxxfxyfeeyfeefeefeeefeefxfeefefxeP107A22(2、3、5)、2()1()(1)()0(0)1(1)1()()()12y=cosx=cos2121y=2cos22cos2222y=xey=Cxe+Cxe=1xe+1e1x-e111y==1111!y=11nnnxnnnxxnnnnnxxxnnnnxxnxnnnxxxxnxxx、3、5、1111!1111!11nnnnnnnnxxxP107A25(2)、221lntantan22tan2secsec1122csc22sintlntan2antan22xxdyddxxxxddxdxxdxxxxxy