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# C3 Question watch

1. The differential of the curve

is

The curve f(x) has a turning point at p, the x co-ordinate of p is

Show that

So far what I've done

So what do I do know take the natural log of both sides ? But then how is that going to get me closer to my target which I have to show.
2. i have no ideal this is hard lol
3. (Original post by uer23)
From here, you have which is what you want to show.
4. Instead of dividing by 2alpha try dividing by 3e^alpha.
5. (Original post by ttoby)
From here, you have which is what you want to show.
dam beat me to it
6. (Original post by ttoby)
From here, you have which is what you want to show.
I really don't get that at all ? Is there a particular Index law you are using to rewrite the first part.
7. (Original post by reshep)
dam beat me to it
But how ?
8. It's just addition, multiplication and division mate.
9. (Original post by Copacetic)
It's just addition, multiplication and division mate.
No It's more than that.
10. (Original post by uer23)
No It's more than that.
No it isn't.

Are you wondering why 1/6e^a is the same as (1/6)e^-a ?
11. (Original post by Copacetic)
No it isn't.

Are you wondering why 1/6e^a is the same as (1/6)e^-a ?
It's okay I think I've finally got it.

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