LÊ, T. AUXILIARY FUNCTION METHOD IN SOLVING SOME INTEGRATION PROBLEMS USING AVERAGE VALUE THEOREM. SCIENTIFIC JOURNAL OF TAN TRAO UNIVERSITY, [S. l.], v. 9, n. 5, 2023. DOI: 10.51453/2354-1431/2023/907. Disponível em: https://tckh.daihoctantrao.edu.vn/index.php/sjttu/article/view/907. Acesso em: 11 may. 2024.