HSC 2017 MX2 Marathon (archive) (1 Viewer)

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EngineeringHelp

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Re: HSC 2017 MX2 Marathon

Just did my half yearly today... 30% of my internal mark... Calculating that im getting in the 70%'s
Why am i still in this course :(
 

davidgoes4wce

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Re: HSC 2017 MX2 Marathon

HSC 2016 Q 10. I spent 5 minutes this morning on this question and couldn't work it out.





Any tips? Advice? Short cuts? I assume 5 minutes would be too long for a question like this .
 

leehuan

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Re: HSC 2017 MX2 Marathon

HSC 2016 Q 10. I spent 5 minutes this morning on this question and couldn't work it out.





Any tips? Advice? Short cuts? I assume 5 minutes would be too long for a question like this .
Just solve the quadratic-in-disguise
 

InteGrand

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Re: HSC 2017 MX2 Marathon

HSC 2016 Q 10. I spent 5 minutes this morning on this question and couldn't work it out.





Any tips? Advice? Short cuts? I assume 5 minutes would be too long for a question like this .
 

Kingom

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Re: HSC 2017 MX2 Marathon

HSC 2016 Q 10. I spent 5 minutes this morning on this question and couldn't work it out.





Any tips? Advice? Short cuts? I assume 5 minutes would be too long for a question like this .
we know that x^2+x+1=0. but this means that x is a cube root of unity ie x^3=1
therefore x^2016=1 and the solution is 2
 

si2136

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Re: HSC 2017 MX2 Marathon

Hey guys, I have a question that I have never encountered before in 4U, how would I go about solving this? Thanks!
CodeCogsEqn.gif
 

si2136

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Re: HSC 2017 MX2 Marathon

Just a curious question, is there a a faster way to prove the Recursive Integration Formulae without going through the long process?
 

pikachu975

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Re: HSC 2017 MX2 Marathon

Just a curious question, is there a a faster way to prove the Recursive Integration Formulae without going through the long process?
What's the long process? Integration by parts?

If you mean integration by parts, then almost all questions involve IBPs, but some can be done by manipulating the integrand.
 

stupid_girl

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Re: HSC 2017 MX2 Marathon

Just a curious question, is there a a faster way to prove the Recursive Integration Formulae without going through the long process?
When you are asked to prove a given reduction formula, the efficient way is usually by differentiation.
 

Paradoxica

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Re: HSC 2017 MX2 Marathon

Given:

x+y+z = 3a

xy + yz + zx = 3b

Where x,y,z are all real, and ab>0, find the greatest and least possible values of any of x,y,z
 

EngineeringHelp

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Re: HSC 2017 MX2 Marathon

Hey Guys!!

I am new around here, and not the best at this 4unit maths subject. When doing questions, I am not able to see the distinct ideas, and i get stuck, not knowing how to approach, or what the best and most efficient approach is. Any tips and help will be most appreciated! <3
 

pikachu975

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Re: HSC 2017 MX2 Marathon

Hey Guys!!

I am new around here, and not the best at this 4unit maths subject. When doing questions, I am not able to see the distinct ideas, and i get stuck, not knowing how to approach, or what the best and most efficient approach is. Any tips and help will be most appreciated! <3
It will come with practice. Maybe post an example question so we can guide you through the thought process!
 
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