### Profile of Student Mathematical Reasoning Ability in Making Proof

#### Abstract

The purpose of this study is to describe how the students' mathematical reasoning profiles in making proof in the real analysis course. This research is a descriptive research. Techniques used to collect data is to provide tests to 25 students of semester V in Real Analysis courses. Data analysis is done by reducing data, presenting data, and make conclusions. The results showed that the students' ability in making proof includes four mathematical reasoning indicators: making guesses, doing mathematical manipulations, giving reasons/explanations, and drawing conclusions. The four mathematical reasoning indicators appear in high-ability students, while midle- ability students are mastering two to three indicators of mathematical reasoning, and low-ability students master one mathematical reasoning indicator.

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