[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [Mathematics in Ancient and Medieval India](https://indike.org/pramana/ins.science.bag-1979) › c7.s2.26 # Mathematics in Ancient and Medieval India c7.s2.26 Mathematics in Ancient and Medieval India c7.s2.26 - **Language:** English ### [c7.s2.26](https://indike.org/pramana/ins.science.bag-1979.c7.s2.26) Āryabhaṭa I calculated the value of unknown number of terms n for an A. P. series when its sum S, first term a, and commn difference b, are known with the help of quadratic equation as follows : - [Previous: c7.s2.25](https://indike.org/pramana/ins.science.bag-1979.c7.s2.25) - [Next: c7.s2.27](https://indike.org/pramana/ins.science.bag-1979.c7.s2.27) - [Up: c7.s2](https://indike.org/pramana/ins.science.bag-1979.c7.s2) --- Source: [https://indike.org/pramana/ins.science.bag-1979.c7.s2.26](https://indike.org/pramana/ins.science.bag-1979.c7.s2.26) · Pramāṇa