Carrotsticks' 2014 Extension 1 HSC Solutions (3 Viewers)

[Carrotsticks]

Here is the link to my solutions!

My apologies for taking so long, I wanted to explain the last probability question in more detail because I know that many students may not understand the solution if I jumped directly to the geometric series.

Please let me know if you see any typos and I'll fix them right up =)

https://www.dropbox.com/s/zt96vjplroj5xtm/HSC 2014 Extension 1 Solutions.pdf?dl=0

 

[iStudent]

Really? I thought you just drew a tangent and where it meets x axis was your approximation :/

 

[QZP]

^

 

[Carrotsticks]

Oh never mind! I mis-read the question!

 

[bishay]

ily carrotsticks <3

 

[bale]

carrotsticks what did u get in hsc maths? 100 for everything?

 

[IR]

carrotsticks what did u get in hsc maths? 100 for everything?

^ seems like you will get 101.

 

[falconpride]

I think this test was a little easy..

 

[Carrotsticks]

Okay, finished. Double checking everything now.

 

[Samir97]

Easier or harder than last year?

 

[noctua]

Waay easier than last year

 

[Carrotsticks]

I've uploaded them.

Please let me know if you see any typos!

 

[jack8964]

The inequality in 11e) is only > than, not >=, isn't it?

 

[aDimitri]

I've uploaded them.

Please let me know if you see any typos!

q11e should be strict inequality

edit: somebody already corrected this

 

[aDimitri]

11.f should be +1 not -1

edit: the product rule at the start is wrong is all, error carried through

 

[EpaX]

11 f) the derivative of e^x lnx should have a + sign, not a - sign

 

[Carrotsticks]

Haha cheers for all this! My goodness, such trivial errors.

It appears that I can neither read nor use the product rule!

 

[Kurosaki]

Had a quick look through, could only spot the product rule error.

 

[aDimitri]

Haha cheers for all this! My goodness, such trivial errors.

It appears that I can neither read nor use the product rule!

other than that everything looks good i think.
would i lose a mark for not writing the units in 12a)ii) ?
and in part 13ciii (parametrics), i only stated that y =/= 2a, i didn't say x =/= 0. would i lose a mark for this?

 

[bishay]

got about 83 raw
what does that scale to ?