Math Ext 1 Predictions/Thoughts (5 Viewers)

[icycledough]

Anyone got any last minute inverse functions tips/tricks, that shit is quite annoying ngl

Make sure you restrict the domain so it is a one-to-one function (which can be tested using the horizontal line test)

When graphing, make sure the inverse is a reflection over the line y = x (so x values swap with y values)

Also for graphing, domain and range switches

 

[5uckerberg]

Just me or does anyone else hear pigeons.... -_-
But in all fairness, that would be pretty meta from NESA if they were to put in a question like that. Id be welcoming of such a thing if it were the case. Just dont gimme a repeat 2020

Pigeonhole principle

 

[stupidpersonlol]

lol im gonna fail

 

[vishnay]

If like last year (although that isn't the best way to look at it), there were only 3 marks of advanced stats questions, although quite simple questions (like finding the expected value, standard deviation and probability between 2 values).

but thats necessary for the binomial distributions topic

 

[Siwel]

but thats necessary for the binomial distributions topic

yeah i was more referring to continuous random variables and discrete both of which shouldnt be in a x1 exam, but idk anymore

 

[notme123]

Pigeonhole principle

last years php q was a bit freaky but doable after some thonking

 

[vishnay]

last years php q was a bit freaky but doable after some thonking

nah that one was really easy

looked very approachable

 

[notme123]

nah that one was really easy

looked very approachable

have you ever seen the one with a 3x3 grid where you can place either a 1 or a 0 in each square and adding the rows and columns gives a number and you have to prove that at least one of the results at least 3 times or smth i forgot the exact q. your pigeon holes are all possible outcomes i.e. 0,1,2,3 and your pigeons are the sums of the rows i think. thinking about it i think there was a restriction on the number of 1s and 0s.

 

[luminol]

yeah i was more referring to continuous random variables and discrete both of which shouldnt be in a x1 exam, but idk anymore

Advanced is assumed knowledge so technically you should know about it, but since Extension 1 has almost the same amount of content to cover with 30 less marks in the exam, I doubt they would do that
That being said, continuous random variables mostly just involves integrating a pdf function between values (possibly with x1 functions) and percentiles involves equating your cdf with a suitable value

 

[Siwel]

Advanced is assumed knowledge so technically you should know about it, but since Extension 1 has almost the same amount of content to cover with 30 less marks in the exam, I doubt they would do that
That being said, continuous random variables mostly just involves integrating a pdf function between values (possibly with x1 functions) and percentiles involves equating your cdf with a suitable value

yeah i understand its assumed knowledge but its just a pain to have to go over 2 different textbooks for a 1 unit course

 

[Life'sHard]

Is central limit theory assessable in the HSC? For binomial distribution?

 

[stupidpersonlol]

dont think soQUOTE="Life'sHard, post: 7409484, member: 1611360863"]
Is central limit theory assessable in the HSC? For binomial distribution?
[/QUOTE]

 

[luminol]

Is central limit theory assessable in the HSC? For binomial distribution?

It's helpful to keep in mind for why we can approximate sample proportions to normal distributions under certain conditions, but we don't need to know about it.

 

[windebygirl]

nah that was too easy. all of q 14 is gonna be combinatorics

8 marks of last years q14 was combinatorics/binomials why would they do it again
we'll defs get some fat projectile tho, but it should be fun

 

[notme123]

we'll defs get some fat projectile tho, but it should be fun

they better not im gonna get ptsd mid exam

 

[Siwel]

they better not im gonna get ptsd mid exam

lol, i dont think its gonna be just a bunch of variables, they are a lot nicer in x1

 

[windebygirl]

they better not im gonna get ptsd mid exam

pretty sure that projectiles was only tested in mc last year meaning we're almost guaranteed some big question in q11-14
can't be any worse than the ext 2 5 marker...

 

[icycledough]

pretty sure that projectiles was only tested in mc last year meaning we're almost guaranteed some big question in q11-14
can't be any worse than the ext 2 5 marker...

I think that projectile motion in Extension 1 is far nicer than in Extension 2. Usually, they tests things like range of motion, time of flight, angle of projection needed to travel 'x' distance, maximum height, all of which can be found by the motion equations.

 

[stupidpersonlol]

i really hope theres no forces

 

[icycledough]

i really hope theres no forces

I'm not sure if forces is assessible in 3U or not ... definitely, it was tested in 4U last year.