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STEP I, II, III 2011 Solutions Thread.

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Reply 60
Avatar for davros
davros
16
Original post by mikelbird
Is it just me or are Cambridge Assessment a bit late in publishing their examiners reports on STEP????


They're all up now :smile:
Reply 61
Avatar for Bljah
Bljah
gawd, this whole STEP thing was so frustrating. So glad it's over and that all went well :smile:
Reply 62
Avatar for cxs
cxs
14
an elegant way of doing the last part of paper2Q9 is to use （e-1）（f-1）>0，which can quickly eliminate most of the terms ，and the remainings are all positive
also because the ramainings are all positive ，it is not a hard inequality，so we can use lots of methods todo that—like what answers do
Reply 63
Avatar for cxs
cxs
14
Pretty can't understand how we can get u2=v(1-v) so quickly. Is it derived from "observation" ? And I get it grom v/u=x/2, so x=2v/u, and eliminate x by substitute into the expression of u.
Original post by mikelbird
Solution to Paper3 Question 8
See attachment
Original post by cxs
Pretty can't understand how we can get u2=v(1-v) so quickly. Is it derived from "observation" ? And I get it grom v/u=x/2, so x=2v/u, and eliminate x by substitute into the expression of u.
PDFStep2011Paper3Question8.pdf351.7KB
Reply 65
Avatar for cxs
cxs
14
Thanks!
Original post by mikelbird
See attachment

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