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# Can you used c3 differentiation in c2 Watch

1. Hello, I'm on the edexcel exam board and I'm retaking c2, can you use, say the quotient rule in c2 or will they not give you the marks ?
Thanks

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2. Yes but you won't need it.
3. (Original post by Joshmeid)
Yes but you won't need it.
Yeah I know but I have forgotten how to differentiate say: (x^2+3x-7) / x
Without using that rule I know it's stupid but I can't remember

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4. (Original post by betsickles)
Yeah I know but I have forgotten how to differentiate say: (x^2+3x-7) / x
Without using that rule I know it's stupid but I can't remember

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Just split up the numerator and differentiate term by term.

5. (Original post by Indeterminate)
Just split up the numerator and differentiate term by term.

Yeah I did that but I've completely blanked at how to differentiate 7/x.. Do you do 7x^(-1) then do that?

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6. (Original post by betsickles)
Yeah I did that but I've completely blanked at how to differentiate 7/x.. Do you do 7x^(-1) then do that?

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Yes
7. (Original post by betsickles)
Yeah I did that but I've completely blanked at how to differentiate 7/x.. Do you do 7x^(-1) then do that?

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yeah the only time that you wont see 1/x etc is on integration on C2 because that goes to lnx
8. Thanks everyone! C2 has a lot more chapters than I remember 2 years ago, darn gap year resits :/

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