AFL 7th October 2020 - 11G1 Math. by Lakshmi Sathyanarayanan https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd Find the value of 'n' if (n + 1)! = 12 x (n - 1)! (Where 'n' is a natural number) en-us 2020-10-06 13:40:05 UTC 2026-03-16 09:31:15 UTC hello@padlet.com Soha 11g1 https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809635900  (n + 1)! = 12 x (n - 1)!
(n+1)n! = 12 x  n!/n (since (n-1)! = n!/n)
divide by n!
(n+1) (n) = 12
n^2 + n - 12 = 0
(n+4) (n-3) = 0
therefore n = 3 ]]> 2020-10-07 08:59:36 UTC https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809635900 Nameera https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809636057 (n+1)! = 12(n-1)!
(n+1)(n!)= 12(n!)/n
n2+n-12=0
Therefore, n=3

]]> 2020-10-07 08:59:41 UTC https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809636057 Naillya-11G1 gvnaillya5 https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809637896 2020-10-07 09:00:49 UTC https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809637896 https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809638318 Abhipsa]]> 2020-10-07 09:01:05 UTC https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809638318 Ann https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809646372 n=3 
n cannot be equal to -4 ]]> 2020-10-07 09:05:53 UTC https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809646372 Levita https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809647335 2020-10-07 09:06:29 UTC https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809647335 Hanna 11G1 https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809654803 (n+1)(n)(n-1!)=12x(n-1)!
n^2+n=12
n=3]]> 2020-10-07 09:10:59 UTC https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809654803 Ria https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809655541 (n+1)(n)(n-1)! = 12 x (n-1)!
(n+1)(n) = 12
n2 + n - 12 = 0
n + 4n - 3n -12 = 0
n = 3
n = -4 (not possible)

Therefore, n = 3]]> 2020-10-07 09:11:23 UTC https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809655541 Ginan https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809657694 (n+1)! = 12 (n-1)!
(n+1) (n) (n-1) ! = 12 (n-1) !
n^2+n-12=0
n^2+4n-3n-12 = 0
n(n+4) -3 (n+4)  = 0
(n+4) (n-3) = 0
n = -4, 3
Final answer:
n = 3.]]> 2020-10-07 09:12:42 UTC https://padlet.com/boomasathyanarayanan/i7tees4t66jumvnd/wish/809657694