basic algebra and arithmetic "marathon". (3 Viewers)

[ohexploitable]

Same thing Lol. How did you write it that way? It just fucking shows -1.

oh wait... lol, I read your answer wrong...

 

[ohexploitable]

Put spaces in between 'em.

 

[hscishard]

When two absolute values are being delt with, it's best not to use the sqaure method.

Here is the sqaure method:

RHS
=5- |3t-1|
= 25 - 10|3t-1| + [9t^2 - 6t +1] <---- squared
Hence combining LHS with RHS

t^2 + 4t+4 < 9t^2 -6t+26 -10|3t-1|
10|3t-1| < 8t^2 - 10t + 22
|3t-1| < 8t^2/10 - 10t/10 +22/10

Imaging solving that. Lol and you have to solve the negative part too.

 

[ohexploitable]

Yar, just do cases and don't forget to check solutions!

 

[hscishard]

Lol, 25% of the posts in this thread are mine

 

[ohexploitable]

lol I got 65/164, so 40%

 

[ohexploitable]

New Question:

Find the equation of the parabola that intersects the points (1,-1), (2,2) and (-1,5).

 

[hscishard]

New Question:

Find the equation of the parabola that intersects the points (1,-1), (2,2) and (-1,5).

Simultaneous equations of ax^2 + bx + c.

Not bothered doing it. Lol

 

[Trebla]

Or.....use Lagrange interpolation! Lagrange polynomial - Wikipedia, the free encyclopedia

 

[hscishard]

Or.....use Lagrange interpolation! Lagrange polynomial - Wikipedia, the free encyclopedia

That doesn't look two unit or three unit friendly.

 

[AAEldar]

I want to do some of these questions, yet I haven't been taught them, how lame >.<

 

[ohexploitable]

I want to do some of these questions, yet I haven't been taught them, how lame >.<

Srsly? This is like late year 10/early year 11 stuff. You should be way past this.

 

[Trebla]

Don't worry about the Lagrange interpolation lol. It's only to raise awareness of alternative methods. The other alternative method within the scope of the HSC syllabus is suppose the parabola takes the form y = k(x - a)² + h and then also solve three simultaneous equations for k, a and h.

 

[hscishard]

I want to do some of these questions, yet I haven't been taught them, how lame >.<

Dw, these are just challenge questions

 

[party]

Dw, these are just challenge questions

yeah i cant do it as well

 

[AAEldar]

Srsly? This is like late year 10/early year 11 stuff. You should be way past this.

Yea, we did Parabola in Year 10, somewhere near the start, but haven't touched it since. It's coming up some time this year, but I wouldn't have a clue how to answer that question.

 

[Memi]

Haha my school is so mediocre that we haven't even touched on the topic of Parabolas. Yup, we suck x[

No idea how to do that question so I shall linger around and wait for someone to answer >;]

 

[ohexploitable]

It has already been answered.

Simultaneous equations of ax^2 + bx + c.

Not bothered doing it. Lol

 

[ohexploitable]

It's not even a parabola question, it's a simultaneous equations questions.

 

[AAEldar]

It's not even a parabola question, it's a simultaneous equations questions.

Well we've done Simultaneous Equations, but I wouldn't know how to do it just from getting the coordinates haha.