My Lecturer give me this problems, help please, ...not all, .. one number is all right, at least I'll get an example to solve the other ....

Thank you very much

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- Mar 13th 2008, 05:38 PM #1

- Mar 13th 2008, 05:57 PM #2

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- Mar 13th 2008, 06:08 PM #3

- Mar 13th 2008, 06:41 PM #4

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- Mar 16th 2008, 06:10 AM #5
I try thtat , and the equation become

**Bernoulli Eq**. and I should use**Substitution**to make it become**Linear D.E**?

After I get the homogeneous solution then wath should I do, I mean, how to use the undetermined coefficient method? should I convert the "sinx " in to "e^ia thing"

And for number**5)**, the**variation of parameters methode**is the methode taht using**wronskian**? Sorry i can't remember the name of the methods...

**Thanks Again**

- Mar 16th 2008, 06:32 AM #6

- Mar 16th 2008, 06:46 AM #7After I get the homogeneous solution then wath should I do, I mean, how to use the undetermined coefficient method? should I convert the "sinx " in to "e^ia thing

Method of undetermined coefficients - Wikipedia, the free encyclopedia

after reading this article you'll come to the conclusion that you should assume a particular solution of following form:

just plug it in the ode and equate the appropriate coefficients.

- Mar 16th 2008, 05:34 PM #8