Search results

here is or otherwise method for 12cii

there has been the accusation that the am-qm inequality is oos but consider the following totally non-oos derivation \begin{aligned}(a-b)^2&\ge0\\a^2-2ab+b^2&\ge0\\2a^2+2b^2&\ge a^2+2ab+b^2\\\textstyle\frac{a^2+b^2}{2}&\ge\textstyle\left(\frac{a+b}{2}\right)^2\\...

mg is out: https://educationstandards.nsw.edu.au/wps/wcm/connect/9fe8c5c2-161a-4f91-baf6-5c59c862fdcf/2024-hsc-maths-ext-1-mg.pdf?MOD=AJPERES&CACHEID=ROOTWORKSPACE-9fe8c5c2-161a-4f91-baf6-5c59c862fdcf-pcZ41mf

here solution to q10 utilising am-qm inequality it can be done using calculus too but the am-qm inequality more efficient most people heard of the am-gm inequality, but the am-qm often helps if u want the inequality to go "the other way"

and here is the list of all the or otherwises in this years maths exams advanced - once in Q30 ext. 1 - once in Q13bii ext. 2 - 4 times in Q11eii, Q12cii, Q13aii and Q15aiii

now i bet you think this generalisation of triangle inequality has nothing whatsoever to do with this exam right? however ............. 15aiii said or otherwise and so here is the "or otherwise" method using generalised triangle inequality!

yeah very gradually there has been an attempt to fill the significant gaps in the solutions at https://www.masteringhscmathematics.com.au/solutions for 4u but there is a new drive that consolidates these efforts, and although still not complete, there's a lot more there. hopefully will be...

cognito solutions: https://www.cognitotuition.com/blog/2024-hsc-3u-mathematics-extension-1-exam-paper-exemplar-answers-solutions pdf version attached. note they don't do the reasoning for mc

here cognito solutions: https://www.cognitotuition.com/blog/2024-hsc-4u-mathematics-extension-2-exam-paper-exemplar-answers-solutions pdf version attached. they somewhat more detailed than nesa's but don't do reasoning for mc

mg is up: https://educationstandards.nsw.edu.au/wps/wcm/connect/ccd3eec6-76ac-464f-b0d2-ecf60de040b0/2024-hsc-maths-ext-2-mg.pdf?MOD=AJPERES&CACHEID=ROOTWORKSPACE-ccd3eec6-76ac-464f-b0d2-ecf60de040b0-pcJJGdt

in the vce they put up sample exam covers on their website prior to the exams, but this year some of them contained hidden content very similar to the actual questions in their exams. some students were able to extract this content prior to the exam and whether or not this gave them a real...

watching gladiator ii now

std 2 mg is out now: https://educationstandards.nsw.edu.au/wps/wcm/connect/a22e40c7-b56c-4ab6-bd5d-199ab95200bb/2024-hsc-maths-std-2-mg.pdf?MOD=AJPERES&CACHEID=ROOTWORKSPACE-a22e40c7-b56c-4ab6-bd5d-199ab95200bb-pcuHx69

official paper is up: https://educationstandards.nsw.edu.au/wps/portal/nesa/resource-finder/hsc-exam-papers/2024/physics-2024-hsc-exam-pack albeit redacted, so my unredacted version in post #293 is better

this one

i made a slightly easier one good?

13aii said or otherwise here otherwise method using cross product good?

they don't but people want to know how they went as soon as they finish the exam. so some try to get solutions out within a few hours so people don't have to wait for nesa solution it is also good, especially in extension 2 to get multiple solutions from various sources to see all the...

solutions are in post #290 from there 29b sol is:

cognito recently became the first with solutions to the chemistry and physics papers, and they missed the boat with maths as far as being first is concerned but nevertheless apparently they are coming out with solutions to ext.1 and 2 eventually, but don't know when they have placeholders for...