2026 HSC CHAT (5 Viewers)

[Study to success]

View attachment 47381
HELPP I CANT DO THESEE AHSHFHFJ

I think there supposed to be like a semicircle/ hyperbola thing. Maybe try graphing it on Desmos so u have a rough idea on how it’s supposed to look. I think maybe finding the vertex and intercepts of the equation in the denominator can help u find the domain and range

 

[cristal]

View attachment 47381
HELPP I CANT DO THESEE AHSHFHFJ

Denominator has to be positive (inside the squareroot, not the result of the square root) and not 0 so make an inequality
Factorise from there
Smthing along the lines of that

 

[Study to success]

Denominator has to be positive and not 0 so make an unequality
Factorise from there
Smthing along the lines of that

Yeah that’s right and then u make the equation greater and equal to 0 I think . Idk if that right but then u just solve for x with the inequality sign

 

[cheesynooby]

View attachment 47381
HELPP I CANT DO THESEE AHSHFHFJ

domain:
1. solve the quadratic and identify its concavity to find the x values where it is negative e.g. if it has x intercepts at x = -2 and 2, and is concave up the quadratic is negative between x = -2 and 2. since u cant square root a negative and cant divide by 0, that gives u the domain (x < -2, x > 2)

range:
2. find the range of the quadratic by finding the y coord of the vertex. e.g. vertex at (1, 3) and concave down = range: y ≤ 3
3. square root that (keeping in mind u can't square root a negative)-> 0 ≤ y ≤ sqrt3
4. find the reciprocal of that (a graph of y = 1/x could be useful - imagine the range of 1/x if you could only plug in values between 0 and sqrt3 (from step 3) -> y ≥ 1/sqrt3

 

[cristal]

What textbook did u get it from

looks like cambridge btw

 

[cheesynooby]

looks like cambridge btw

enrichment of 3B in the ext1 text

 

[cristal]

Yeah that’s right and then u make the equation greater and equal to 0 I think . Idk if that right but then u just solve for x with the inequality sign

no just greater than, 1/0 isn't valid

 

[cristal]

enrichment of 3B in the ext1 text

are you a walking cambridge

 

[Study to success]

enrichment of 3B in the ext1 text

So I’ll never be asked this in an adv exam right?

 

[jane1820]

View attachment 47381
HELPP I CANT DO THESEE AHSHFHFJ

Domain:
Factorise the denominator then solve (root(whatever u got when factorised) > 0)
range:
u need to sketch it or use desmos/geogebra

 

[cristal]

bc you'd make a good bridging course

 

[jane1820]

bc you'd make a good bridging course

Plz Get out

 

[cheesynooby]

So I’ll never be asked this in an adv exam right?

well it's adv content so theoretically u could be asked it
however it's very challenging and it's in the enrichment section, so something like this would only be asked if the examiners are feeling nasty and would likely be split into many parts and be worth a lot of marks

 

[jane1820]

Domain:
Factorise the denominator then solve (root(whatever u got when factorised) > 0)
range:
u need to sketch it or use desmos/geogebra

I just realised the question had ‘likewise’ that means u just need to copy ur working out for a (so not much brain power)

 

[NotBamboo]

1. if u solve the quadratic and identify its concavity u can find the x values where it is negative e.g. if it has x intercepts at x = -2 and 2, and is concave up the quadratic is negative between x = -2 and 2. since u cant square root a negative and cant divide by 0, that gives u the domain (x < -2, x > 2)
2. find the range of the quadratic by finding the y coord of the vertex. e.g. vertex at (1, 3) and concave down = range: y ≤ 3
3. square root that (keeping in mind u can't square root a negative)-> 0 ≤ y ≤ sqrt3
4. find the reciprocal of that (a graph of y = 1/x could be useful) -> y ≥ 1/sqrt3

bro i was gonna do it first
cheater

 

[Study to success]

well it's adv content so theoretically u could be asked it
however it's very challenging and it's in the enrichment section, so something like this would only be asked if the examiners are feeling nasty and would likely be split into many parts and be worth a lot of marks

Ok. I’ll prob practice smth like this towards prelim or next year

 

[cristal]

So I’ll never be asked this in an adv exam right?

but that topic falls into the adv section so it's possible (ie not a ext1 topic)

 

[cheesynooby]

bro i was gonna do it first
cheater

too slow haha
u can still do it and try to explain it better cuz i don't think my answer is very easy to understand

 

[jane1820]

So I’ll never be asked this in an adv exam right?

These were the types of questions we did in class bc ‘they’re too easy’

 

[jane1820]

These were the types of questions we did in class bc ‘they’re too easy’

Honestly my teacher thinks enrichment cambridge is fair and if we cant do them we should drop to std (only for adv obviously enrichment ext is diff)