<![CDATA[Advanced calculus is one of the courses given after Calculus I and Calculus II. Students who are given the Advanced Calculus course are 5th semester students of the PGRI Adi Buana University Surabaya. This study aims to describe the mistakes of students in solving Advanced Calculus questions. The research method used in this research is descriptive qualitative research. The instrument used in this study was a written test consisting of 5 questions on limits and continuity, partial and derivative derivatives, derivative algebra and chain rule, high oeder partial derivatives, maximum and minimum problems. Technique triangulation was used to test the validity of the data. The results showed that the students made the most computation errors. Students' understanding of limits, continuity, and derivatives of the two-variable function is not yet fully strong. Lecturers can apply the learning process even better by checking their understanding of limits, continuity, and derivatives of one variable function first (perhaps at a glance), before explaining students about limits, continuity, and derivatives of two-variable functions.]]>
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