IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => IGCSE/ GCSE => Math => Topic started by: ~M.J~ on May 16, 2009, 08:28:40 pm

Title: Maths P4 HELP
Post by: ~M.J~ on May 16, 2009, 08:28:40 pm: Show that 2+4+6+8........+2n=n(n+1)
Title: Re: Maths P4 HELP
Post by: ~M.J~ on May 16, 2009, 08:32:53 pm: wasted 30 mins on this tricky question n got nothin
Title: Re: Maths P4 HELP
Post by: susman on May 16, 2009, 08:33:07 pm: me as well.....
wasted 30 mins..
its is really time wasting but simple i think because it is of only 2 marks
Title: Re: Maths P4 HELP
Post by: theigstudent on May 16, 2009, 08:37:00 pm: Quote from: mjerrar on May 16, 2009, 08:28:40 pm
Show that 2+4+6+8........+2n=n(n+1)

could u tell which pap is it frm so i could help u
Title: Re: Maths P4 HELP
Post by: ~M.J~ on May 16, 2009, 08:39:01 pm: oct/nov 2008 p4
Title: Re: Maths P4 HELP
Post by: theigstudent on May 16, 2009, 08:52:05 pm: 2 (1 + 2 + 3 + ….. + n) =
2 ×n(n +1)
2

= n (n + 1)
Title: Re: Maths P4 HELP
Post by: ~M.J~ on May 16, 2009, 08:57:29 pm: thanxalot
by the way i was so stupid
i didn't look in the ms
Title: Re: Maths P4 HELP
Post by: theigstudent on May 16, 2009, 08:59:09 pm: its k :D