用换元法计算下列积分：[tex=4.071x2.643]083DcokPjtmQ5ozbI21f8pvUEWG/dDiYrGXvpcvKCag=[/tex]
用换元法计算下列积分：[tex=4.071x2.643]083DcokPjtmQ5ozbI21f8pvUEWG/dDiYrGXvpcvKCag=[/tex]
1
用换元法计算下列积分：[tex=4.071x2.643]083DcokPjtmQ5ozbI21f8pvUEWG/dDiYrGXvpcvKCag=[/tex]