Pengembangan LKS Berbantuan Geogebra for Smartphone Mata Kuliah Kalkulus Diferensial pada Materi Pertidaksamaan Fungsi
The study was conducted due to the unsatisfied results of students’ answers and interviews on Differential Calculus material in which the students graphically did not understand the interpretation of a function that was being solved and were not proficient in manipulating algebra, therefore, no solution was found. Based on these findings, a geogebra-assisted worksheet for smartphones was designed to improve students' understanding on the topic of inequality. This study aimed to develop student worksheets in understanding the topic of inaccuracy in a function. This worksheet consisted of two parts that help students building their own understanding on the graphic form of an equation and its solution both graphically and procedurally through algebra. To see the feasibility of the worksheets, expert validation and practicality tests were conducted to students. The results of the revision were then distributed to 10 Untirta Mathematics Education students who were taking the MK Differential Calculus. Students spent 60 minutes to complete it. They tried to find the solutions to the problems given with the help of geogebra for smartphones, by firstly solving them graphically and finding the points referred to in the Cartesian diagram. Then, they solved the problems with algebraic manipulation as a form of confirmation of the answers obtained. After completing the whole worksheet, it was shown that the students could solve the problems graphically well.