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

Qualification => Subject Doubts => GCE AS & A2 Level => Math => Topic started by: houmeira on September 23, 2010, 05:21:59 pm

Title: Maths Paper 1
Post by: houmeira on September 23, 2010, 05:21:59 pm

can anyone help me with this question please?

Find the equation of the curve which passes through the point (1,6)
and for which dy/dx=(1/sqrt x)(x-2/2x)

i can't integrate it:(

Title: Re: Maths Paper 1
Post by: Deadly_king on September 23, 2010, 05:57:04 pm

Quote from: houmeira on September 23, 2010, 05:21:59 pm

can anyone help me with this question please?

Find the equation of the curve which passes through the point (1,6)
and for which dy/dx=(1/sqrt x)(x-2/2x)

i can't integrate it:(

Well am not sure.......it would be nice if someone could confirm the answer.

I got....... y = x^1/2 + 2/x^1/2 + 3

First you need to multiply the denominators so as to obtain one fraction only. You'll get (x - 2)/(2 x^3/2)
Then you separate the fraction again to get 1/(2 x^1/2) - 1/(x ^3/2)
From there its easier to integrate..........try it out.

If you still cannot do it........let me know. :)

Title: Re: Maths Paper 1
Post by: S.M.A.T on September 23, 2010, 06:40:26 pm

Your answer is correct :)

Title: Re: Maths Paper 1
Post by: *Hope* on September 24, 2010, 03:15:32 am

+rep DK :D

Title: Re: Maths Paper 1
Post by: Deadly_king on September 24, 2010, 05:08:10 am

Thanks for confirming my answer asif :)

Thank You *Hope* :)
I told you.........you are very encouraging :)

Title: Re: Maths Paper 1
Post by: *Hope* on September 24, 2010, 08:12:59 am

Quote from: Deadly_king on September 24, 2010, 05:08:10 am

Thanks for confirming my answer asif :)

Thank You *Hope* :)
I told you.........you are very encouraging :)

Don't mention it ;)

You really deserve it :)