![prove that n -1 factorial divided by n-r-1factorial +r*n-1factorial divided by n-r factorial =n factorial divide by n-r factorial - Maths - - 12891987 | Meritnation.com prove that n -1 factorial divided by n-r-1factorial +r*n-1factorial divided by n-r factorial =n factorial divide by n-r factorial - Maths - - 12891987 | Meritnation.com](https://s3mn.mnimgs.com/img/shared/content_ck_images/ck_5b4e9e5f4a5bd.jpeg)
prove that n -1 factorial divided by n-r-1factorial +r*n-1factorial divided by n-r factorial =n factorial divide by n-r factorial - Maths - - 12891987 | Meritnation.com
![Factorial of a Number (n!) Formula & Calculator | Learning mathematics, Mathematical analysis, Learning math Factorial of a Number (n!) Formula & Calculator | Learning mathematics, Mathematical analysis, Learning math](https://i.pinimg.com/474x/e6/f7/d8/e6f7d8a249b6e20d71c2e49375008146.jpg)
Factorial of a Number (n!) Formula & Calculator | Learning mathematics, Mathematical analysis, Learning math
![Maitrayee Mukerji. Factorial For any positive integer n, its factorial is n! is: n! = 1 * 2 * 3 * 4* ….* (n-1) * n 0! = 1 1 ! = 1 2! = 1 * 2 = 2 5! = - ppt download Maitrayee Mukerji. Factorial For any positive integer n, its factorial is n! is: n! = 1 * 2 * 3 * 4* ….* (n-1) * n 0! = 1 1 ! = 1 2! = 1 * 2 = 2 5! = - ppt download](https://images.slideplayer.com/35/10397658/slides/slide_2.jpg)