FP - transformations of non-linear differential equations

I'm attempting question2 on page 72 of the AQA FP3 booklet.

I've managed part a but then I'm stuck.

I've tried du/dx = -e^u then u = -xe^u + C but it's nothing like the answer in the book.

I need some help please.

Below is the question.

Original post by maggiehodgson

I'm attempting question2 on page 72 of the AQA FP3 booklet.

I've managed part a but then I'm stuck.

I've tried du/dx = -e^u then u = -xe^u + C but it's nothing like the answer in the book.

I need some help please.

Below is the question.

Have you considered Seperation of variables?

Reply 2

BobLoblawLawBlog

16

Original post by maggiehodgson

I'm attempting question2 on page 72 of the AQA FP3 booklet.

I've managed part a but then I'm stuck.

I've tried du/dx = -e^u then u = -xe^u + C but it's nothing like the answer in the book.

I need some help please.

Below is the question.