« previous next »
Pages: 1 ... 70 71 [72] 73 74 ... 80   Go Down

Author Topic: IGCSE MATHS Doubts  (Read 130775 times)

Offline Vin

  • SF V.I.P
  • ********
  • Posts: 7914
  • Reputation: 52609
  • Gender: Male
    • Theory of Life - A new skew.
Re: IGCSE MATHS Doubts
« Reply #1065 on: May 18, 2010, 10:35:29 pm »

LOL we are the masters of sequences !!
Logged

Offline the_grim_reaper

  • SF Citizen
  • ***
  • Posts: 160
  • Reputation: 180
  • Gender: Male
Re: IGCSE MATHS Doubts
« Reply #1066 on: May 18, 2010, 10:35:41 pm »
Quote
1,3,6,10 write next 4 sequence fast please          
            
urgently fast reply plaese
       


it's .5n^2+.5n

Just use a+(n-1)d+1/2(n-1)(n-2)c

where a is the first term (1), d is the difference between the first and second term (2 here) and c is the second difference

1  3   6   10
  2  3    4        (3-1), (6-3), (10-6) NOW
     1   1           (3-2), (4-3)


Find the next terms by substitution ( n by 5, 6, 7, 8,9)

Logged

Offline Vin

  • SF V.I.P
  • ********
  • Posts: 7914
  • Reputation: 52609
  • Gender: Male
    • Theory of Life - A new skew.
Re: IGCSE MATHS Doubts
« Reply #1067 on: May 18, 2010, 10:36:49 pm »

dude chill she hasnt asked for the nth term =P
Logged

Offline princess12

  • SF Master
  • ******
  • Posts: 1234
  • Reputation: 1650
  • Gender: Female
Re: IGCSE MATHS Doubts
« Reply #1068 on: May 18, 2010, 10:37:10 pm »
GOOD LUCK EVERY ONE FOR ALL SUBJECTS  :D  :D  :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D[/size][/color]
Logged
We should be kind to after teachers

Offline haris94

  • SF Senior Citizen
  • *****
  • Posts: 930
  • Reputation: 984
  • Gender: Male
Re: IGCSE MATHS Doubts
« Reply #1069 on: May 18, 2010, 10:37:31 pm »
Quote from: ~VIN1094~ on May 18, 2010, 10:35:29 pm
LOL we are the masters of sequences !!

oyea  8)
Logged
WHAT WE DO IN LIFE ECHOES AN ETERNITY

Offline the_grim_reaper

  • SF Citizen
  • ***
  • Posts: 160
  • Reputation: 180
  • Gender: Male
Re: IGCSE MATHS Doubts
« Reply #1070 on: May 18, 2010, 10:38:32 pm »
Quote
dude chill she hasnt asked for the nth term =P


HAHAHAHAHAH sorry :D. TOo sleepy. Didn't read it properly. Anyway, it'll help her understand how to find it :D.
Logged

Offline bulono

  • SF Citizen
  • ***
  • Posts: 150
  • Reputation: 65535
  • Gender: Male
Re: IGCSE MATHS Doubts
« Reply #1071 on: May 18, 2010, 10:39:09 pm »
OK guys im gonna get some sleep now.....good luck for tomorrows paper.....and just CHILLL
Logged

Offline ksitna

  • Allhamdullillah
  • SF Geek
  • ****
  • Posts: 497
  • Reputation: 491
  • Gender: Female
Re: IGCSE MATHS Doubts
« Reply #1072 on: May 18, 2010, 10:39:57 pm »
Quote from: haris94 on May 18, 2010, 10:37:31 pm
oyea  8)

absolutely! not simplifying tho :/


and good night bulono :)
good luck for tomz
Logged
take whatever you want and give nothing back :)

Offline the_grim_reaper

  • SF Citizen
  • ***
  • Posts: 160
  • Reputation: 180
  • Gender: Male
Re: IGCSE MATHS Doubts
« Reply #1073 on: May 18, 2010, 10:41:02 pm »
Quote
No, salooo!

Houn saloo??? hahaha I'll see you in the morning :P.
Logged

Offline dsiddiqi11

  • Newbie
  • *
  • Posts: 45
  • Reputation: 53
Re: IGCSE MATHS Doubts
« Reply #1074 on: May 18, 2010, 10:46:19 pm »
can someone plzzzzzzz explain me paper 4 june 2009, question 2d, very confusing!!!!!
Logged

Offline the_grim_reaper

  • SF Citizen
  • ***
  • Posts: 160
  • Reputation: 180
  • Gender: Male
Re: IGCSE MATHS Doubts
« Reply #1075 on: May 18, 2010, 10:57:15 pm »
Quote
can someone plzzzzzzz explain me paper 4 june 2009, question 2d, very confusing!!!!!

Friend from the previous question you'll know that ?(FX) here is 148. and ?(F) is 50
 
Now  ?(FX) is  144 + x (x is sum of those 10 rolls)
?(F) is 60 (the total number of rolls)
                               148 +x
mean is 2.95 so 2.95=---------
                                60

so 60 X 2.95= 148 + x
so X= 177-148=29 (sum of those 10 rolls)

now mean is sum/frequency= 29/10=2.9
Logged

Offline the_grim_reaper

  • SF Citizen
  • ***
  • Posts: 160
  • Reputation: 180
  • Gender: Male
Re: IGCSE MATHS Doubts
« Reply #1076 on: May 18, 2010, 10:58:03 pm »
the ? stands for (SIGMA)
Logged

Offline ksitna

  • Allhamdullillah
  • SF Geek
  • ****
  • Posts: 497
  • Reputation: 491
  • Gender: Female
Re: IGCSE MATHS Doubts
« Reply #1077 on: May 18, 2010, 11:03:54 pm »
i neeed help with this
oct nov 06
8 b) iv)
Logged
take whatever you want and give nothing back :)

Offline SoONa

  • SF Immigrant
  • **
  • Posts: 54
  • Reputation: 66
  • Gender: Female
Re: IGCSE MATHS Doubts
« Reply #1078 on: May 18, 2010, 11:06:59 pm »
Quote from: ksitna on May 18, 2010, 10:33:36 pm
yes thts correct :D

yaaaaaaaaaay thank u
Logged

Offline dsiddiqi11

  • Newbie
  • *
  • Posts: 45
  • Reputation: 53
Re: IGCSE MATHS Doubts
« Reply #1079 on: May 18, 2010, 11:13:05 pm »
Quote from: deadman786 on May 18, 2010, 10:57:15 pm
Friend from the previous question you'll know that ?(FX) here is 148. and ?(F) is 50
 
Now  ?(FX) is  144 + x (x is sum of those 10 rolls)
?(F) is 60 (the total number of rolls)
                               148 +x
mean is 2.95 so 2.95=---------
                                60

so 60 X 2.95= 148 + x
so X= 177-148=29 (sum of those 10 rolls)

now mean is sum/frequency= 29/10=2.9


Thanks mate, understood it very well
Logged
Pages: 1 ... 70 71 [72] 73 74 ... 80   Go Up
« previous next »