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Differentiation help!! A2 watch

1. SO i need help on the part (iii)
So far i've got
2. (Original post by TheAlphaParticle)
SO i need help on the part (iii)
So far i've got
I have no idea how you managed to get that for f(x-1). To get f(x-1) you should have subbed (x-1) into wherever you saw an (x) in the original f(x).
3. It should be
4. Is it k=e^-2 ?
5. (Original post by jamestg)
Is it k=e^-2 ?
Yes.
6. (Original post by NotNotBatman)
Yes.
Cracking. Well, that's my c3 revision done for today.
7. (Original post by jamestg)
Is it k=e^-2 ?
Questions like these never come up in Edexcel, they always ask some basic stuff like differentiate sin x

think I may do mei papers from now on
Spoiler:
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8. (Original post by Naruke)
Questions like these never come up in Edexcel, they always ask some basic stuff like differentiate sin x

think I may do mei papers from now on
Spoiler:
Show

Is MEI harder/more involved than edexcel? I'm currently on one past paper per week but I want to do more!
9. (Original post by jamestg)
Is MEI harder/more involved than edexcel? I'm currently on one past paper per week but I want to do more!
Well, there is a reason why Edexcel is the most widely taken exam board for maths
10. (Original post by Naruke)
Well, there is a reason why Edexcel is the most widely taken exam board for maths
That can't be the reason! It's probably down to resources

But I'll give a few papers a go
11. (Original post by Naruke)
Questions like these never come up in Edexcel, they always ask some basic stuff like differentiate sin x

think I may do mei papers from now on
Spoiler:
Show

If those exam question's aren't feeling challenging, you can have a go at deriving the general result for the th derivative of a product of two functions, . And who knows, perhaps this result can help you with whatever else.
12. (Original post by RDKGames)
If those exam question's aren't feeling challenging, you can have a go at deriving the general result for the th derivative of a product of two functions, . And who knows, perhaps this result can help you with whatever else.

let

.
.
.
13. (Original post by Naruke)
let

.
.
.
Does that hold for n=4?
14. (Original post by RDKGames)
Does that hold for n=4?
nope oh i see now

pascal

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