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HSC 2013-14 MX1 Marathon (archive) (1 Viewer)

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Re: HSC 2013 3U Marathon Thread

I only really had a look at the CHALLENGE questions he had for both 2U and 3U recently (post HSC) and I realised there are some very beautiful questions there, that many teachers/school inevitably don't get to. Or you can use MIF and just stop learning, but that's a different story.

QUESTION:

Simplify
 
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HeroicPandas

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Re: HSC 2013 3U Marathon Thread

I only really had a look at the CHALLENGE questions he had for both 2U and 3U recently (post HSC) and I realised there are some very beautiful questions there, that many teachers/school inevitably don't get to. Or you can use MIF and just stop learning, but that's a different story.

QUESTION:

Simplify

wasted my time because u had tricked me...












I've touched MIF at school, and i will never return to it...
 
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Re: HSC 2013 3U Marathon Thread

Lol. I successfully tricked you. .

And also in your last line of latex, don't bold the 0, this implies it is the 0 vector - irrelevant at the moment but still.
 

omgiloverice

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Re: HSC 2013 3U Marathon Thread

Did i do it correctly?
I guess~ I can't really find any logical faults. But another way you can do it is by dividing by

And you'll get which then makes the whole process so much more clearer
 

study1234

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Re: HSC 2013 3U Marathon Thread

In the expansion of (1+3x+ax^2)^n, where n is a positive integer, the coefficient of x^2 is 0. Find, in terms of n, the value of the coefficient of x^3.
 
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Re: HSC 2013 3U Marathon Thread

where are you getting these questions from? or are you making them?
Pretty sure that came from 2011 2U HSC modified. (lol I remember it).

I think other questions come from overseas papers. (Step, HK etc)
 

luvglee4lyfe

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Re: HSC 2013 3U Marathon Thread

Lol. I successfully tricked you. .

And also in your last line of latex, don't bold the 0, this implies it is the 0 vector - irrelevant at the moment but still.
Hey asianese, I've been seeing you on the p00n! But anyways, we used vectors in Year 11 Physics and I don't really get what you're saying?
 

nightweaver066

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Re: HSC 2013 3U Marathon Thread

Hey asianese, I've been seeing you on the p00n! But anyways, we used vectors in Year 11 Physics and I don't really get what you're saying?
When studying vectors in uni, you're taught this.

Pretty sure that came from 2011 2U HSC modified. (lol I remember it).

I think other questions come from overseas papers. (Step, HK etc)
ahh ok cheers. Was thinking of stealing some questions in here for my student to do haha
 

Sy123

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Re: HSC 2013 3U Marathon Thread

















where are you getting these questions from? or are you making them?
Some questions I do genuinely make (not this one). Otherwise I will sometimes steal from STEP/Internet/modified HSC/trials.

Pretty sure that came from 2011 2U HSC modified. (lol I remember it).

I think other questions come from overseas papers. (Step, HK etc)
I got that from a 4U trial Q8 and removed the first part of the question.
Which just goes to show how weak of a question it was lol.
 

Sy123

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Re: HSC 2013 3U Marathon Thread

(Note I'm giving numbers here because the expression you get if it were all pro numerals would be very big and ugly)

====

Some engineers are in a laboratory in space, they are testing a new gravity simulation machine on a projectile, and assessing the effects of an instant change in gravity to a projectile in flight.
They fire a projectile with a speed of 10m/s at an angle 45 degrees to the horizontal. After 0.5 seconds they change the gravity so that the new gravity is perpendicular to the old gravity force, i.e. the inital gravity force perpendicular to the x-axis is now perpendicular to the y-axis. After another 0.5 seconds they swap it back to the initial gravity force and they let the projectile continue its flight.

All gravitational acceleration is 10m/s^2.

Calculate the final range of the projectile.
 

Sy123

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Re: HSC 2013 3U Marathon Thread

 
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