[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) › c8.s3.20 # Mathematics in Ancient and Medieval India c8.s3.20 Mathematics in Ancient and Medieval India c8.s3.20 - **Language:** English ### [c8.s3.20](https://indike.org/pramana/ins.science.bag-1979.c8.s3.20) We can express this also in the following form : $π=3+4\[1/(3³-3)-1/(5³-5)+1/(7³-7)-········\]$ $or,(π-3)/4=1/(3³-3)-1/(5³-5)+1/(7³-7)-1/(9³-9)+········$ $or,(π-3)/4=\[(1/2.3.4-1/4.5.6)+(1/6.7.8-1/8.9.10)+······\]$ $or,(π-3)/6=⅔\[(1/2.3.4-1/4.5.6)+(1/6.7.8-1/8.9.10)+···\]$ $=\[1/((2.2²-1)²-2²)+1/((2.4²-1)²-4²).$ $.+1/((2.6²-1)²-6²)+········\]$ - [Previous: c8.s3.19](https://indike.org/pramana/ins.science.bag-1979.c8.s3.19) - [Next: c8.s3.21](https://indike.org/pramana/ins.science.bag-1979.c8.s3.21) - [Up: c8.s3](https://indike.org/pramana/ins.science.bag-1979.c8.s3) --- Source: [https://indike.org/pramana/ins.science.bag-1979.c8.s3.20](https://indike.org/pramana/ins.science.bag-1979.c8.s3.20) · Pramāṇa