Mathematics Extension 1 Exam Predictions/Thoughts (1 Viewer)

[programen]

does this look right

 

[Idkwhattoput]

How long did we finish the paper in guys?

50-55mins

 

[Arrowshaft]

The way I worked out the inverse was that since the domain for f(x) was x>=-1, the range for f-1(x) was y>=-1, and then solved it from there there graphically

 

[Arrowshaft]

View attachment 27445

Careful, it’s not always 1, the denominator is actually | cos x | and it happens to be 1 for the given domain because cos is > 0 in that domain

 

[AHafza]

So what is state rank raw?

 

[Arrowshaft]

So what is state rank raw?

Probably 99 or 100

 

[AHafza]

Probably 99 or 100

Rip

 

[worldno17]

I had 70min left when I got up to 14bii. But then I had a mental block for 70 minutes.

Same here I had 65 mins but then got completely stuck on 2nd part of last q (14 c ii?).

 

[fet]

u people had xy minutes left what the heck I had like 10 seconds left and I still wasn't finished

 

[Time&moretime]

u people had xy minutes left what the heck I had like 10 seconds left and I still wasn't finished

Same here

 

[Arrowshaft]

Same here I had 65 mins but then got completely stuck on 2nd part of last q (14 c ii?).

wait ahah I meant 14 c ii not b ii lool

 

[Arrowshaft]

But yeah, I got stuck on it too.

 

[worldno17]

wait ahah I meant 14 c ii not b ii lool

Lol i was thinking - did you spend 70 mins on newton's method? But yeah...i got stuck there too. And it's just some trig manipulation. oh well

 

[worldno17]

Asked this b4 but no one replied - will I get deducted if I expressed alpha in terms of k? I had k in terms of alpha a few lines above. :/

 

[Arrowshaft]

Lol i was thinking - did you spend 70 mins on newton's method? But yeah...i got stuck there too. And it's just some trig manipulation. oh well

Yeah I saw someone’s solutions, you find alpha in terms of x0 from the expression in (i) and then sub it into sin(x0)

 

[Arrowshaft]

Asked this b4 but no one replied - will I get deducted if I expressed alpha in terms of k? I had k in terms of alpha a few lines above. :/

Oof, that’ll be a tough one, depends on the marker really; I think probabilistically yes, because it did ask for k in terms of alpha explicitly.

 

[gunnerfan99]

was question 8 multiple choice A or B?

 

[worldno17]

Oof, that’ll be a tough one, depends on the marker really; I think probabilistically yes, because it did ask for k in terms of alpha explicitly.

Hopefully alignment is good this year then. :/

 

[Arrowshaft]

Hopefully alignment is good this year then. :/

Hope so, i think i got around 95% raw cause of dumbass sillies, hopefully that can align to a 98 fingers crossed

 

[Arrowshaft]

Also do you get your actual paper back if you buy raw marks from nesa and what you got wrong indicated?