Question

Hello, I need to be explained how to simplify factiorials. So, I have a problem:

\[\frac{ 40! }{ 38!+39! }\]
So, I think, I need to do this:
\[\frac{ 38! *39*40}{ 38!(1+39 )}=39\]
is it correct?

Answer 1

@saifoo.khan

Answer 2

i think the denominator is off

Answer 3

let me dbl chk

n! + (n+1)!

n! + (n+1)*n!

n!(1+n+1)

.... looks good

Answer 4

so, did I get a correct answer?

Answer 5

yep, you were right :)

Answer 6

thank you!