<![CDATA[The concept of limit is a basic concept to build several calculus concepts such asderivative and integral. Several students do not understand the formal definition of limitfunction and can’t applied of formal definition of limit function to prove the truth of limitvalue. The objective of the study is to describe the students’ understanding on the concept of limit function in one point. The understanding, in the research, consists of instrumentalunderstanding (able to write the concept of limit function in one point but could notexplain it well) and relational understanding (able to write and explain the concept of limitfunction in one point it well). The subjects of the study were three students of MathematicsDepartment that the person has high ability (ST) with GPA more than 3.50; moderateability (SS) with GPA between 3.10 and 3.50; and low ability (SR) with GPA less than3.10. In order to reveal the data of the study, task based interview was implemented to theresearch subjects. The results of the study reveal that the understanding of high achiever(ST) and moderate achiever (SS) to the aspects observed, generally included relationalunderstanding, while the low ability in general included instrumental understanding.]]>
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