The 2012 STEP Results Discussion Thread
Maths exam discussion - share revision tips in preparation for GCSE, A Level and other maths exams and discuss how they went afterwards.
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Re: The 2012 STEP Prep Thread!Are you setting aX+b for the numerator for the fraction with denominator 1+x^2 ? Remember the numerator must be 1 degree lower.(Original post by fruktas)
Question 2 STEP II 2008
Can anyone help me with the partial fractions? ( I know, I know).
I can see very clearly what to do in this question, but my my partial fractions are
not coming out right
If it's not that, I'm assuming it's a trivial sign or division error? -
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Re: The 2012 STEP Prep Thread!Really!? Sadly, this is the first time I am hearing about this. It works now. thank you!(Original post by Llewellyn)
Are you setting aX+b for the numerator for the fraction with denominator 1+x^2 ? Remember the numerator must be 1 degree lower.
If it's not that, I'm assuming it's a trivial sign or division error? -
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Re: The 2012 STEP Prep Thread!U SERIOUS!!!!!!(Original post by fruktas)
Really!? Sadly, this is the first time I am hearing about this. It works now. thank you!
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Re: The 2012 STEP Prep Thread!main thing is that now you do(Original post by fruktas)
I know, sadly I was never taught that, and I sort of never encountered it before. Wow, I sound like a moron hahaha
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Re: The 2012 STEP Prep Thread!Ah yeah that clear's it up - thanks(Original post by mikelbird)
I hope this explains it...... -
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Re: The 2012 STEP Prep Thread!yh implicitly...(Original post by 8inchestall)
cant be bothered to look back for a quote, but I saw some people mention logarithmic differentiation, can someone clarify what this is?
is it as simple as
then differentiate? -
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Re: The 2012 STEP Prep Thread!Alternatively notice that x^x is equivalent to e^xlnx(Original post by 8inchestall)
cant be bothered to look back for a quote, but I saw some people mention logarithmic differentiation, can someone clarify what this is?
is it as simple as
then differentiate?Last edited by Extricated; 16-05-2012 at 22:40. -
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Re: The 2012 STEP Prep Thread!And what after that?(Original post by Extricated)
Alternatively notice that x^x is equivalent to e^xlnx -
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Re: The 2012 STEP Prep Thread!then differentiate.....as its now an elementary function.(Original post by Dog4444)
And what after that? -
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Re: The 2012 STEP Prep Thread!(Original post by Dog4444)
And what after that?
(You learn this in C3/4 I think). -
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Re: The 2012 STEP Prep Thread!That's one application, yes.(Original post by 8inchestall)
cant be bothered to look back for a quote, but I saw some people mention logarithmic differentiation, can someone clarify what this is?
is it as simple as
then differentiate?
Another useful one is for differentiating products. ie.
.
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Re: The 2012 STEP Prep Thread!for some odd reason or another....even though I know this- Ive never used it(Original post by Zuzuzu)
That's one application, yes.
Another useful one is for differentiating products. ie..
I would be interested to see where it can be used effectively 
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Re: The 2012 STEP Prep Thread!Surely it restricts the domain of the function?(Original post by Rahul.S)
for some odd reason or another....even though I know this- Ive never used it I would be interested to see where it can be used effectively
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Re: The 2012 STEP Prep Thread!nah, you can do some clever things with branch cuts and effectively give yourself a workable natural log for -ve numbers.(Original post by wcp100)
Surely it restricts the domain of the function?
