Abstract
Geometric sequences and series is one of the mathematical topics for secondary and high school level that has many applications in everyday life. However, many students still have obstacles in learning this topic. This research aims to analyze students’ learning obstacles in geometric sequence and series. To do so, a written test consists of four questions related to conceptual understanding and the application of a geometric sequences and series was regulated to 20 students from one senior high school in Kota Tangerang Selatan. After being tested, students’ answers were analyzed for possible learning obstacles. 4 students were selected to conduct interviews based on their answers. The results show that the learning obstacles are classified into epistemological, ontogenic, and didactical obstacles. In conclusion, students experience obstacles in learning the topic of geometric sequences and series. Furthermore, the results of this research can be used by teachers as considerations in designing learning situation of this topic.
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