9 Replies
@Apu
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.What's the given solution?? Is there some context I'm missing or?
C(n,2) should be combination isn't it? I mean it's not defined in the problem so guess we gotta assume
Yeah, but unless there's a sum, you wouldn't get any kind of e there??
nC2/(n+1)! is just a function
This was the solution provided. :/
So it is a sum
It seems they asked for the summation of nC2/(n+1)!
And they've telescoped it