代数4.3-4.7解答

https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid=0B545VXSP9sY8NDkxYTk4ZDUtYTBmNS00OGYzLTg3NGQtN2ZkNmRlODM3ZGQz&hl=en_US