Re: HSC 2015 3U Marathon
For n =3, you get 50.
Note: This can be done using knowledge of series/sequences in the 3U syllabus. No real fancy manipulation.
EDIT: Spoilers hardly work on the forum for some reason.
Re: HSC 2015 3U Marathon
\textup{Find the}\; n\textup{-th term of the sequence}
\frac{1}{10}, \frac{9}{30}, \frac{24}{70}, \frac{46}{150}, \frac{75}{310}, \frac{111}{630} ...
\textup{Please only answer if you're doing 3U or if you know how to do it give a slight hint to those}
Well this will vary but I can think of a few reasons why they aren't responding. If you are the brightest/studious in the group they may feel timid in talking so it's best if you try to talk in a non-condescending way, the second reason is maybe they have other assignments (due quite soon) that...
Re: MX2 2015 Integration Marathon
Your method is valid. I'm not attacking your method, it's fine. I'm saying there would be an alternative since in this thread people usually post things you can't do directly, i.e using integration by parts straight away.
Re: MX2 2015 Integration Marathon
Usually I don't think someone would post a question with just a straight up 4U technique, it usually requires some extra work/substitution.
Notice how 169 = 12^2 + 5^2
Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread
\frac{1}{\sqrt[3]{2} -1 }
\textup{Let's see if we can do it using our difference between two squares technique,}
\frac{1}{\sqrt[3]{2} -1 } *\frac{\sqrt[3]{2} + 1 }{\sqrt[3]{2} +1 }
\frac{\sqrt[3]{2} + 1 }{(\sqrt[3]{2}...
Re: MX2 2015 Integration Marathon
Also if any of you guys are interested, the University of New South Wales hosts an annual integration bee (so that will be sometime early 2016) after your 2015 graduation if any of keen integratorrrs are interested.