This research is based on the presence of obstacle in learning mathematics on inverse function. This research aims to analyze the learning obstacle, to know the types of error that is suffered by the students in learning inverse function. Kind of this kualitative research descriptive with data triangulation. The research subjects are high school students which is contained of 74 students and was taken 6 students to be main sample. The data of students' error is obtained from the writen test result, the students' false answers are identified into the type of error. Then it was chosen several students to be interviewed. Which the analysis result finding data in this research showed there are 4 types of errors, which are concept error, procedure error, counting error and concluding error. An obstacle which appear in learning inverse function is influenced by two factors, i.e internal factor and eksternal factor. Internal factor is showed by the students' motivation in following learning and students' skill in receiving learning material. While the eksternal factor is showed by the curriculum which applied in school with acceleration class caused many narrow learning time, teaching materials that is less complete with the discussion of question sample. Keywords: Inverse Function, Learning Obstacle, Learning Process.
AbstrakPenelitian ini didasarkan pada keberadaan hambatan dalam pembelajaran matematika materi fungsi invers. Tujuan penelitian ini adalah untuk menganalisa hambatan belajar dan jenisnya, sebagaimana dialami siswa saat mempelajari fungsi invers. Penelitian ini menggunakan metode deskriptif kualitatif dengan triangulasi data. Subjek penelitian ini adalah 74 siswa sekolah menengah atas dan diambil 6 siswa sebagai sampel utama untuk diwawancara. Tes digunakan untuk memperoleh data kesalahan siswa, selanjutnya tipe kesalahan diperoleh dari identifikasi jawaban yang salah. Berdasarkan hasil temuan, diperoleh 4 tipe kesalahan yaitu kesalahan konsep, kesalahan prosedur, kesalahan perhitungan, dan kesalahan penyimpulan. Hambatan yang muncul dalam mempelajari fungsi invers dipengaruhi 2 faktor, yaitu eksternal dan internal. Faktor internal terlihat dari motivasi siswa dalam mengikuti pembelajaran dan kemampuan siswa menerima materi pembelajaran. Sedangkan faktor eksternal adalah penerapan kurikulum kelas akselerasi yang diterapkan sekolah mengakibatkan pendeknya waktu belajar, bahan ajar yang kurang lengkap dalam mendiskusikan contoh soal.