Go to navigation
It is currently Mon Jan 16, 2017 3:02 pm

All times are UTC




Post new topic Reply to topic  [ 3 posts ] 
Author Message
PostPosted: Wed Jan 07, 2015 10:45 pm 
Offline

Joined: Fri Sep 19, 2014 4:32 pm
Posts: 212
please help is there any trick to working out this question??


Top
 Profile  
 
PostPosted: Wed Jan 07, 2015 10:54 pm 
Offline

Joined: Fri Sep 19, 2014 4:32 pm
Posts: 212
We write s(2,5) as an abbreviation for 2+3+4+5 so that s(2,5) = 14

Similarly

S(6,39) = 6+7+8+9+....+ 38 + 39 = 765

Work out:

s(1,3) =
s(6,40) =
s(7, 38) =

s(1,2) - s(2,3) + S (3,4) - s(4,5)+ ......... - S (18,19) + S (19,20) =


Top
 Profile  
 
PostPosted: Wed Jan 07, 2015 10:59 pm 
Offline

Joined: Mon Feb 12, 2007 1:21 pm
Posts: 12082
We've had this before - try searching.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC


Who is online

Users browsing this forum: Ahins, Google [Bot] and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
CALL 020 8204 5060
   
Privacy Policy | Refund Policy | Disclaimer | Copyright © 2004 – 2017