Question

how to write number those are similar to n! ? Is there any method on this ?

such as : (-1)(1)(3)(5)(7) . . . . . (2n - 3)

thanks in advance !

Answer 1

http://mathworld.wolfram.com/DoubleFactorial.html

it's not just factorial :)

Answer 2

The answer to your question would be \(-(2n-3)!!\)

Answer 3

Oh gawd. I do get the idea but I'm currently studying Calculus 2 (taylor series). Do I need this ?

Answer 4

don't think so, but this is actually not hard to comprehend :)
(i'm in Grade 9)

Answer 5

wow ... ok. Thank you !!

Answer 6

no problem :)

Answer 7

fanned you :D