HSC 2015 MX1 Marathon (archive) (1 Viewer)

[davidgoes4wce]

Re: HSC 2015 3U Marathon




Not really sure why they had to use C0=1. I understand that you have to substitute x=1 into the equation

 

[davidgoes4wce]

Re: HSC 2015 3U Marathon

Wait I understand it now. C1 is the first term, C2 is the 2nd term of the summation

 

[davidgoes4wce]

Re: HSC 2015 3U Marathon

Actually I still dont quite get how they get C0=1

 

[Drsoccerball]

Re: HSC 2015 3U Marathon

Actually I still dont quite get how they get C0=1

nC0 =1 from binomial triangle...

 

[Crisium]

Re: HSC 2015 3U Marathon

Wait I understand it now. C1 is the first term, C2 is the 2nd term of the summation

Actually I still dont quite get how they get C0=1

You should probably have a proper read of the theory before you go onto doing some questions especially for a topic like binomial and perhaps start off at the beginning of the topic to get a better understanding of how binomial relates to Pascal's Triangle

 

[kawaiipotato]

Re: HSC 2015 3U Marathon

And the definition:

 

[Ambility]

Re: HSC 2015 3U Marathon

Show that

 

[davidgoes4wce]

Re: HSC 2015 3U Marathon

Not sure if anyone can draw one of these shapes for the parabola.

 

[rand_althor]

Re: HSC 2015 3U Marathon

 

[davidgoes4wce]

Re: HSC 2015 3U Marathon

your too good rand , your too good

 

[davidgoes4wce]

Re: HSC 2015 3U Marathon

Have got a bit of confusion on part (c)



My thinking is you have to expand the terms next to the summation then substitute what they did in parts a) and b) . Is that something we should remember in this course the binomial expansion of (1+x)^n =C0 +C1X+C2X^2+C3 X^3+......CN X^N?

 

[davidgoes4wce]

Re: HSC 2015 3U Marathon

Have been watching a few clips on Youtube from Eddie Woo. To be fair, he has explained it better than the textbooks I have read so far from Terry Lee, Grove, Fitzpatrick and Hosri.

Think this is a topic where you need someone to explain it to you step by step.

 

[Drsoccerball]

Re: HSC 2015 3U Marathon

bruh can you learn it in class before posting questions so you dont derail?

 

[davidgoes4wce]

Re: HSC 2015 3U Marathon

Spending an hour learning Geogebra. I want to design my own maths questions.

 

[davidgoes4wce]

Re: HSC 2015 3U Marathon

Only learn about Latex this year, want to build on my knowledge.

 

[davidgoes4wce]

Re: HSC 2015 3U Marathon

Have got a bit of confusion on part (c)



My thinking is you have to expand the terms next to the summation then substitute what they did in parts a) and b) . Is that something we should remember in this course the binomial expansion of (1+x)^n =C0 +C1X+C2X^2+C3 X^3+......CN X^N?

I also say I have a slightly better understanding of this question going through the theory again.

 

[davidgoes4wce]

Re: HSC 2015 3U Marathon

True or False Question.

For a cyclic quadrilateral to be true, all four corners of the quadrilateral must be touching the circles.

 

[InteGrand]

Re: HSC 2015 3U Marathon

True or False Question.

For a cyclic quadrilateral to be true, all four corners of the quadrilateral must be touching the circles.

By definition a cyclic quadrilateral is a quadrilateral whose four vertices all lie on a circle.

 

[braintic]

Re: HSC 2015 3U Marathon

For a cyclic quadrilateral to be true

That wording is pretty meaningless. A statement is true or false, not an object.

You mean "for a quadrilateral to be cyclic".

And "corners" is not a mathematical word. You mean "vertices".

And what is THE circle?

 

[Ambility]

Re: HSC 2015 3U Marathon

Tangents are drawn from the ends of a focal chord on the parabola at points and . Find the locus of the intersection of these tangents.