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

Qualification => Subject Doubts => GCE AS & A2 Level => Math => Topic started by: ifraha18 on May 26, 2010, 03:29:29 pm

Title: p3 problems here.!!!!
Post by: ifraha18 on May 26, 2010, 03:29:29 pm

june 2002 question 6 part 2...i cant get the final thing


i get stuk here
-ln4+ln2+1

how do u make it 1-ln2?

Title: Re: p3 problems here.!!!!
Post by: astarmathsandphysics on May 26, 2010, 03:39:17 pm

ln4=2ln2
so do ln2-2ln2+1 =1-ln2

Title: Re: p3 problems here.!!!!
Post by: ifraha18 on May 26, 2010, 03:48:11 pm

thnku am so dumb..:P

Title: Re: p3 problems here.!!!!
Post by: ifraha18 on May 27, 2010, 01:41:11 am

may june 2008 q2...

Title: Re: p3 problems here.!!!!
Post by: ifraha18 on May 27, 2010, 03:51:01 am

june 2008 q9 part 2 how do we get the _1/2 limit?????

Title: Re: p3 problems here.!!!!
Post by: preity on May 27, 2010, 05:06:23 am

can someone help me wit these quest...O/N 05 Q7,O/N 06 Q9,M/J 09 Q7...it's all about topic 9....helppppp....

Title: Re: p3 problems here.!!!!
Post by: astarmathsandphysics on May 27, 2010, 07:47:22 am

may june 2008 q2...
sub e^x=p to get p+p^=p^3 and subtract p+p^2 to get p^3-p^2-p=0
factorise p(p^2-p-1) now p=0 or solve the quadratic

Title: Re: p3 problems here.!!!!
Post by: astarmathsandphysics on May 27, 2010, 08:00:28 am

summer 08 qp3 q9

Title: Re: p3 problems here.!!!!
Post by: astarmathsandphysics on May 27, 2010, 08:03:04 am

to get -1/2 limit solve e^-x(1+2x)=0
1+2x=0 since exponentials are never 0 so x=-1/2

Title: Re: p3 problems here.!!!!
Post by: astarmathsandphysics on May 27, 2010, 08:22:37 am

can someone help me wit these quest...O/N 05 Q7,O/N 06 Q9,M/J 09 Q7...it's all about topic 9....helppppp....

Title: Re: p3 problems here.!!!!
Post by: ifraha18 on May 27, 2010, 09:16:48 am

thnkuu soo much!!!

Title: Re: p3 problems here.!!!!
Post by: astarmathsandphysics on May 27, 2010, 09:30:16 am

no probs

Title: Re: p3 problems here.!!!!
Post by: ifraha18 on May 27, 2010, 03:02:43 pm

q10 part 1..june 2009

Title: Re: p3 problems here.!!!!
Post by: pastyear on May 27, 2010, 03:14:51 pm

use differentiation as it is the maximum point.
Then = it to zero

Title: Re: p3 problems here.!!!!
Post by: ifraha18 on May 27, 2010, 03:30:28 pm

i used it but i dont get the point acurately

Title: Re: p3 problems here.!!!!
Post by: astarmathsandphysics on May 27, 2010, 03:48:19 pm

Later

Title: Re: p3 problems here.!!!!
Post by: ifraha18 on May 27, 2010, 04:52:33 pm

i got it..Thanks niways..:)

Title: Re: p3 problems here.!!!!
Post by: preity on May 27, 2010, 06:26:20 pm

hey ifraha can u pls shw me how to solve to m/j 09 Q10 pls?

Title: Re: p3 problems here.!!!!
Post by: immortal on May 27, 2010, 07:55:33 pm

Quote from: astarmathsandphysics on May 27, 2010, 08:22:37 am

can someone help me wit these quest...O/N 05 Q7,O/N 06 Q9,M/J 09 Q7...it's all about topic 9....helppppp....

I kho i didnt ask 4 this,but still thank u verry much...

Title: Re: p3 problems here.!!!!
Post by: astarmathsandphysics on May 27, 2010, 08:53:46 pm

when I get home

Title: Re: p3 problems here.!!!!
Post by: insane.kid on May 27, 2010, 09:16:27 pm

Astar plz can u help me in
1) W07 10i)
2) S08 10ii)

thank u :)

Title: Re: p3 problems here.!!!!
Post by: astarmathsandphysics on May 27, 2010, 09:48:27 pm

Will do. 1 hour

Title: Re: p3 problems here.!!!!
Post by: astarmathsandphysics on May 27, 2010, 10:27:59 pm

q10 attached june 09

Title: Re: p3 problems here.!!!!
Post by: astarmathsandphysics on May 27, 2010, 10:38:28 pm

here foor nov 07 q10. Check my prev post also

Title: Re: p3 problems here.!!!!
Post by: preity on May 27, 2010, 11:35:09 pm

thanks a lot astar..my exam is in 3 hours time...wish me luck..

Title: Re: p3 problems here.!!!!
Post by: astarmathsandphysics on May 27, 2010, 11:42:17 pm

good luck. Let me know how it went

Title: Re: p3 problems here.!!!!
Post by: insane.kid on May 28, 2010, 01:19:29 am

Thank u Astar for ur help, but cld u even show the s08 10ii) question also plz bcz i cant find ur previous post or just post the link of ur post thank u and best of luck to every1 doin the exam :D