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Author Topic: IGCSE MATHS Doubts  (Read 126517 times)

Offline Vin

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Re: IGCSE MATHS Doubts
« Reply #1065 on: May 18, 2010, 10:35:29 pm »

LOL we are the masters of sequences !!
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Offline the_grim_reaper

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Re: IGCSE MATHS Doubts
« Reply #1066 on: May 18, 2010, 10:35:41 pm »
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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)

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Offline Vin

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Re: IGCSE MATHS Doubts
« Reply #1067 on: May 18, 2010, 10:36:49 pm »

dude chill she hasnt asked for the nth term =P
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Offline princess12

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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]
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Offline haris94

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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)
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Offline the_grim_reaper

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Re: IGCSE MATHS Doubts
« Reply #1070 on: May 18, 2010, 10:38:32 pm »
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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.
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Offline bulono

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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
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Offline ksitna

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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
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Offline the_grim_reaper

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Re: IGCSE MATHS Doubts
« Reply #1073 on: May 18, 2010, 10:41:02 pm »
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No, salooo!

Houn saloo??? hahaha I'll see you in the morning :P.
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Offline dsiddiqi11

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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!!!!!
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Offline the_grim_reaper

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Re: IGCSE MATHS Doubts
« Reply #1075 on: May 18, 2010, 10:57:15 pm »
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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
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Offline the_grim_reaper

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Re: IGCSE MATHS Doubts
« Reply #1076 on: May 18, 2010, 10:58:03 pm »
the ? stands for (SIGMA)
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Offline ksitna

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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)
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Offline SoONa

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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
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Offline dsiddiqi11

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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
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