I have another one with DE but the problems is slightly different

[Sonal7]

The question below asks for a general DE. I did that and the answer matches mine. I am now stuck on the how what happens to y as x tends to infinity. I have some workings but i cant see how when n = 7/2, x tends to infinity that y will be 2/3. I think I am overly complicating things. I wondered if the first part of the question actually helps when values of x and y are provided and the constant A is deduced making c to be 70.
I just need a pointer or two... Thanks a lot

 

[tkhunny]

WAY too much trouble on the last page. A little review of Rational Functions might help you on your way. You do have the right idea, but, like I said, too much trouble...

Maybe rewrite it like this:

[math]\dfrac{10x^{7/2} + Stuff}{35x^{n} + Other\;Stuff}[/math]

 

[Sonal7]

Thats very helpful. Thank you

 

[Sonal7]

Is there a textbook that you can recommend, the A level textbooks are too easy

 

[tkhunny]

Sorry, not really my field. There are long-experienced educators about. Perhaps they will contribute a suggestion.