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

Qualification => Subject Doubts => IGCSE/ GCSE => Math => Topic started by: holtadit on November 10, 2009, 04:11:37 pm

Title: Help me aditoxic in a really simple math vector thingy
Post by: holtadit on November 10, 2009, 04:11:37 pm

Q 5)a)ii)  Can u explain how u get the answer. Usually i can do these kind of sums but my brain is numbed from naming isomers... :-[

Title: Re: Help me aditoxic in a really simple math vector thingy
Post by: falafail on November 10, 2009, 05:53:28 pm

it's OD + DE
OD is d, and DE is -0.5c
so it's d - 0.5c

.. is it? ;D

Title: Re: Help me aditoxic in a really simple math vector thingy
Post by: Saladin on November 10, 2009, 05:58:16 pm

Ezee

ED is half of OC

so,

it is OD + DE

so it is d - 0.5 c

becasue u r going in the opposite direction!!

Title: Re: Help me aditoxic in a really simple math vector thingy
Post by: @d!_†oX!© on November 11, 2009, 10:30:10 am

i am soooo sorry ari.....i didn't notice this question till now....dunno wat's wrong wid my account...it alwas shows no messages on the unread whereas there are messages...
anyways is the answer clear to u now...or should i explain too??

Title: Re: Help me aditoxic in a really simple math vector thingy
Post by: Sumaiya jackie on November 11, 2009, 10:31:29 am

I agree... its is  .....  d - 0.5 c
or is it ???

Title: Re: Help me aditoxic in a really simple math vector thingy
Post by: @d!_†oX!© on November 11, 2009, 10:33:29 am

the answer is right sumaiya!!
it is d-0.5c

Title: Re: Help me aditoxic in a really simple math vector thingy
Post by: holtadit on November 11, 2009, 10:44:38 am

i agree with all of your answers but how can u be sure that DE is half of OC ??

Title: Re: Help me aditoxic in a really simple math vector thingy
Post by: @d!_†oX!© on November 11, 2009, 10:46:28 am

because it is a regular hexagon ari!!

Title: Re: Help me aditoxic in a really simple math vector thingy
Post by: falafail on November 11, 2009, 10:47:05 am

Quote from: Ari Ben Canaan on November 11, 2009, 10:44:38 am

i agree with all of your answers but how can u be sure that DE is half of OC ??

the question says it is a regular hexagon. that means that if you divide it into 6 triangles, they will be equilateral triangles and all sides will be equal. try to visualize it ;D

Title: Re: Help me aditoxic in a really simple math vector thingy
Post by: holtadit on November 11, 2009, 10:50:50 am

Thanks to all of u... quite embarassing that i couldnt do such a simple question  :-[ :-[ :-[

+rep to falafail and thedude !!!

thanks to all of u ppl. !!!

Title: Re: Help me aditoxic in a really simple math vector thingy
Post by: falafail on November 11, 2009, 10:54:21 am

Quote from: Ari Ben Canaan on November 11, 2009, 10:50:50 am

Thanks to all of u... quite embarassing that i couldnt do such a simple question  :-[ :-[ :-[

+rep to falafail and thedude !!!

thanks to all of u ppl. !!!

you're very welcome! :D

Title: Re: Help me aditoxic in a really simple math vector thingy
Post by: eightAs on November 11, 2009, 10:57:36 am

Quote from: Ari Ben Canaan on November 11, 2009, 10:50:50 am

Thanks to all of u... quite embarassing that i couldnt do such a simple question  :-[ :-[ :-[

+rep to falafail and thedude !!!

thanks to all of u ppl. !!!

No need to be embarrassed. This fact isn't very obvious and a lot of ppl don't get it.

Title: Re: Help me aditoxic in a really simple math vector thingy
Post by: ~~~~shreyapril~~~~ on November 11, 2009, 01:06:18 pm

naa..!!
some evenfind the easies question tough!!
like me!!

so dont be so much embarrased!!!

coool!!