Hi, I have to solve using the substitution u=y+x. It isn't necessary to explicitly for y in terms of x. How do I go about doing this? Do I need to use partials when converting to ? Cheers, Ben
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Do I need to use partials... Nope. Just set u = y + x. Then u' = y' + 1. It follows that u' - 1 = y'. Substitute into your DE, and off you go.
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