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# C4 general solution of differential equation watch

1. hi for this question my answer isnt as simplified as the actual answer. The bit highlighted in orange is what I should have siMplified , by multiplying everything by 2. But I didn't do that so at the end I have a power of 1/2. Is that OK? The question doesn't state that it must be simplified ..

Thanks
3. (Original post by coconut64)
hi for this question my answer isnt as simplified as the actual answer. The bit highlighted in orange is what I should have siMplified , by multiplying everything by 2. But I didn't do that so at the end I have a power of 1/2. Is that OK? The question doesn't state that it must be simplified ..

Thanks
Can you please post a picture of the actual question?
4. (Original post by notnek)
Can you please post a picture of the actual question?
2c thanks
5. It doesn't matter if it doesn't say it needs to be simplified, but it's a bad habit to get into.

If I told you that X^(1/2) = 4, you'd immediately thing that x = 16. in the same way as me saying that (x/y)^1/2 = z^1/2 is just a silly way of saying (x/y) = z
6. so then integral of d/dx is f(x) then make each in their own side and don't make them polynomial so that there should be a quick solution that the integrals are with respect to y and x separately?
7. (Original post by Anfanny)
so then integral of d/dx is f(x) then make each in their own side and don't make them polynomial so that there should be a quick solution that the integrals are with respect to y and x separately?
I don't know about the OP, but I really have no idea what you're trying to say here. Just because the subject is maths doesn't mean you don't need to construct cohesive sentences.
8. (Original post by DFranklin)
I don't know about the OP, but I really have no idea what you're trying to say here. Just because the subject is maths doesn't mean you don't need to construct cohesive sentences.
Haha sorry but that's just rude! I think I'm trying to say if f(y)dy/dx=f(x) then the solution is the integral of f(y)dy = the integral of f(x)dx for the differential equation?
9. (Original post by Anfanny)
Haha sorry but that's just rude! I think I'm trying to say if f(y)dy/dx=f(x) then the solution is the integral of f(y)dy = the integral of f(x)dx for the differential equation?
Well, that answer is certainly a lot clearer.

With your first response, I honestly couldn't work out what you were trying to say (with a high degree of confidence), and that's starting from a position of knowing exactly how to solve questions like this. What was "don't make them polynomial" supposed to mean, for example?

It's also a good idea to look at the other posts in the thread: the OP had already done the whole thing of separating variables and integrating, so both of your posts only speak to parts of the question they'd already done without issue.
10. (Original post by Anfanny)
so then integral of d/dx is f(x) then make each in their own side and don't make them polynomial so that there should be a quick solution that the integrals are with respect to y and x separately?
This doesn't make any sense. But looking at some of your other posts, I have a feeling that English is not your first language. Is that correct?

If that's true then you really need to be careful when helping people with maths on an English speaking forum. If you are not confident that what you are writing makes sense then it's probably a good idea not to post, otherwise you may confuse the OP.

It's great that you are helping people with maths, just make sure you read through your replies carefully before posting them
11. It's okay I was asking for clarification on the OPs question just as I still have to do some polynomials myself.
12. Thanks everyone for the help and appreciate it.
13. (Original post by Anfanny)
It's okay I was asking for clarification on the OPs question just as I still have to do some polynomials myself.
Thanks for the help anyway. Don't feel disheartened or anything, English isn't my first language either

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