Question

what is another way to write (2k-1)! ?

Answer 1

1*2*3*4*5.......(2k-2)*(2k-1)

Answer 2

for example 5!=1*2*3*4*5=120

Answer 3

for instance, (k+1)! = (k+1) * k! how does it work in the opposite direction, or does it?

Answer 4

yes it does.

Answer 5

so 2k! * what = (2k-1)!
?

Answer 6

say you have k*k!=(k+1)*k!-k!=(k+1)!-k!

Answer 7

no 2k!*1/2k =(2K-1)!

Answer 8

just like the example given by dipankarstudy
5! = 5*4*3*2*1 = 5*4! = 5* (5-1)!

Answer 9

it is from the basic definition of factorial.

Answer 10

ah kk thank you

Answer 11

dindatc my name is dipankar.

Answer 12

(2k-1)! = (2k-1)(2k-2)(2k-3)(2k-4)........
(2k-1)(2k-2)(2k-3)(2k-4)........ can be written as-> (2k-1)(2k-2)!

Answer 13

@dipankar ok

Answer 14

yes ..thank you for making the answer more clear.

Answer 15

np :)

Answer 16

hi