HSC Extension 2 Mathematics Predictions / Thoughts (1 Viewer)

vinlatte · Oct 26, 2020

shashysha said:
morning of the exam and i am not feeling good about this one lol

At least we have some time to revise before the exam. You got this!!

Xanthi · Oct 26, 2020

Is there actually a way of solving the intersection between 2 spheres using vectors?

Speed’o’sound Sonic · Oct 26, 2020

Xanthi said:
Is there actually a way of solving the intersection between 2 spheres using vectors?

Convert to Cartesian and equate to find values of X, Y and Z

Xanthi · Oct 26, 2020

Speed’o’sound Sonic said:
Convert to Cartesian and equate to find values of X, Y and Z

Yes but strictly speaking that isn't a vector method.

Also sometimes it gets really ugly?

E.g (x-1)^2+(y)^2+z^2=25
And (x-2)^2 (y+2)^2+(z+1)^2= 36 would be extremely hard to solve

Speed’o’sound Sonic · Oct 26, 2020

Xanthi said:
Yes but strictly speaking that isn't a vector method.

Also sometimes it gets really ugly?

E.g (x-1)^2+(y)^2+z^2=25
And (x-2)^2 (y+2)^2+(z+1)^2= 36 would be extremely hard to solve

Yeah. Sadly ugly just happens sometimes. Not sure how you’d use vectors, however there is a method I would recommend. Finding the ratio of r1 to r1 you can find the perpendicular line that separates the circles in the ratio r1:r2 or something along those lines. Would be a lot easier with working paper

shashysha · Oct 26, 2020

Good luck guys, I'll see you here at 5pm in tears

Speed’o’sound Sonic · Oct 26, 2020

How lucky are we! Wowza that was great!

Speed’o’sound Sonic · Oct 26, 2020

How did everyone find it?

shashysha · Oct 26, 2020

rip 4u scaling lol

Speed’o’sound Sonic · Oct 26, 2020

Did anyone find any part of that difficult?

AlphaBetaThetaGamma · Oct 26, 2020

how was it? Tip: It really doesnt matter whether u have done 3u or 4u. In uni (if you are doing engineering/science and related) u will have to do 4u plus a whole lot more in the first maths course in first year.

Speed’o’sound Sonic · Oct 26, 2020

AlphaBetaThetaGamma said:
how was it? Tip: It really doesnt matter whether u have done 3u or 4u. In uni (if you are doing engineering/science and related) u will have to do 4u plus a whole lot more in the first maths course in first year.

Let’s just say it was a lot easier than I was expecting

they were kind to us for COVID I guess. Don’t think I’ll end up doing maths in uni but that’s ok

Fabrizio · Oct 26, 2020

Did people get the last question part 2. When i worked out L(n-1) the numerator and denominator were the opposite way around to what you needed so i couldnt show it repeated. Did it 3 times and kept getting the same

shashysha · Oct 26, 2020

I think it was pretty easy but I made quite a few mistakes

(

Speed’o’sound Sonic · Oct 26, 2020

Fabrizio said:
Did people get the last question part 2. When i worked out L(n-1) the numerator and denominator were the opposite way around to what you needed so i couldnt show it repeated. Did it 3 times and kept getting the same

Yeah. All worked out for me. Part 2 was just a repeated multiplication then multiply top and bottom by a long string of numbers to make the denominator work

shashysha · Oct 26, 2020

Predictions for the E4 cutoff? Probably will hit the 80s mark yeah

Speed’o’sound Sonic · Oct 26, 2020

shashysha said:
Predictions for the E4 cutoff? Probably will hit the 80s mark yeah

Honestly wouldn’t be surprised if it was high 70’s low 80’s. Anywhere in that region

Fabrizio · Oct 26, 2020

Speed’o’sound Sonic said:
Yeah. All worked out for me. Part 2 was just a repeated multiplication then multiply top and bottom by a long string of numbers to make the denominator work

So annoyed, all questions done fine and then spent 1 hour on that question

Speed’o’sound Sonic · Oct 26, 2020

Fabrizio said:
So annoyed, all questions done fine and then spent 1 hour on that question

That’s sucks man. She’ll be right, if that’s the biggest of your worries then you should easily get an E4

vinlatte · Oct 26, 2020

Damn the exam exhausted me. I'm gonna sleep til the ext 1 exam.

HSC Extension 2 Mathematics Predictions / Thoughts (1 Viewer)

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