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# C4 Question on solving diff equations watch

1. I was wondering about this question : question no 2

http://www.london-
oratory.org/maths/Solomon%20C4%20Worksheets/C4Edex/pdf_files/E4Qint_N.pdf

For the answer i got:

sin^4y/4 = x^2 /2 - 7/16

the answer given in the mark scheme is a simplified version of this, but my doubt was wouldn't the values of k / C be different for the different versions ....would this matter at all?
2. (Original post by laurawoods)
I was wondering about this question : question no 2

http://www.london-
oratory.org/maths/Solomon%20C4%20Worksheets/C4Edex/pdf_files/E4Qint_N.pdf

For the answer i got:

sin^4y/4 = x^2 /2 - 7/16

the answer given in the mark scheme is a simplified version of this, but my doubt was wouldn't the values of k / C be different for the different versions ....would this matter at all?
Why would it be different? If it's just a simplified version... if your answer is the same as that in the markscheme (aside from the fact that the answer in the markscheme is simplified), surely your value of k / C would still be correct.
3. (Original post by justinawe)
Why would it be different? If it's just a simplified version... if your answer is the same as that in the markscheme (aside from the fact that the answer in the markscheme is simplified), surely your value of k / C would still be correct.
so can k/ C take different values depending upon how far you have decided to simplify the thing? that is what I was after? looking at the question do u think i would get all the marks?
4. (Original post by laurawoods)
so can k/ C take different values depending upon how far you have decided to simplify the thing? that is what I was after? looking at the question do u think i would get all the marks?
I wouldn't think so, no. It doesn't matter anyway, as long as your working and answer are correct.
5. (Original post by laurawoods)
I was wondering about this question : question no 2

http://www.london-
oratory.org/maths/Solomon%20C4%20Worksheets/C4Edex/pdf_files/E4Qint_N.pdf

For the answer i got:

sin^4y/4 = x^2 /2 - 7/16

the answer given in the mark scheme is a simplified version of this, but my doubt was wouldn't the values of k / C be different for the different versions ....would this matter at all?
I get the same as you - but I would multiply both sides by 4 to make it look neater.

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