Can someone help me out this please? I'll post what

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This is where I've got to. Looking specifically at the beta part under the line on the page, I've almost got it. Thinking I just don't take the second derivatives and say they're too small to matter, but how do I get rid of the first derivatives? Thanks in advance

hopeful bump

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Taylor series is overkill. Just use f(x+Δx) - f(x) ≈ df/dx * Δx. Also, you see what is actually happening instead of just manipulating symbols.

I'm not using second derivative, just continuity of α and β. (So their value at (x-δ,t) is approximately equal to the value at (x,t). The difference goes to zero.)

[I didn't look at your scribbles.]

damn connection errors constantly

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>>312764
Maybe it's because of the special symbols I'm typing. Test...

>>312820
Thanks a lot, this helps a bunch

Can anyone sketch signed directed graphs to illustrate the interactions between chemicals in an
activator-inhibitor (A-I) system and a positive-feedback (P-F) system? It's a question I'm certain is going to come up in the exam next week and I'm completely drawing a blank. There are no such graphs in any of the notes. Thanks guys

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>>312893
something like this maybe?
just a guess

>>312901
Cheers, might be right, who knows. I can put down something like that and hope for the best. Might not even need it as it's 10 marks in part a of a question which is out of 50 but capped at 40