Terry Lee's Answers to 2008 Hsc Maths Ext 1 Exam

**Pwnage101** · 29 Oct 2008, 5:55 PM

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Quote:

Originally Posted by u-borat

uhh i got pi/3 and -pi/3

Same, and we do 4U, so i rekon terry lee is right

Yamiyo · 29 Oct 2008, 5:57 PM

Quote:

Originally Posted by rheno

i think there is a mistake in his solution though....in question 3c(iii) as -pi/2<@<pi/2...so @ cant be +-pi/3 as in his solution.im not sure which is the correct answer though!! am i right or....?

You were thinking too hard lol
60 degrees IS less than 90 degrees.

rheno · 29 Oct 2008, 5:59 PM

ohh...i got it now!!
huhuhu...i got another one wrong!!!argh

u-borat · 29 Oct 2008, 6:00 PM

Quote:

Originally Posted by rheno

oh...i remember my solution for dat question iz 2pi/3 and 4pi/3 as -pi/2<@<pi/2
Am i right..or?
*praying*

is this a joke?

timmiitippii · 29 Oct 2008, 6:03 PM

Quote:

Originally Posted by rheno

i think there is a mistake in his solution though....in question 3c(iii) as -pi/2<@<pi/2...so @ cant be +-pi/3 as in his solution.im not sure which is the correct answer though!! am i right or....?

umm pi/3 is less than pi/2 = =

glockenspiel · 29 Oct 2008, 6:26 PM

I'm going to be honest, I don't remember what I put for everything, but I think I got ~81-83. So stoked! What would that scale to?

scott.syd · 29 Oct 2008, 6:28 PM

yay. 80/84.

Etude · 29 Oct 2008, 8:05 PM

Isnt the answer to 4)b)ii) 7! not 8!/2!

hodarrenkm · 29 Oct 2008, 8:09 PM

Quote:

Originally Posted by Etude

Isnt the answer to 4)b)ii) 7! not 8!/2!

it is 8!/2 cos john either goes in front of or after Barbara

Etude · 29 Oct 2008, 8:11 PM

the question says "if John goes through the doorway after Barbara" so how can john go before barbara

hodarrenkm · 29 Oct 2008, 8:14 PM

Quote:

Originally Posted by Etude

the question says "if John goes through the doorway after Barbara" so how can john go before barbara

yeh thats y u divide 8! by 2

Etude · 29 Oct 2008, 8:16 PM

dividing by 2 implies you can have john first then barbara or barbara first then john. the qn states john goes thru after barbara, that means barbara first then john so how can the 2 swap.

hodarrenkm · 29 Oct 2008, 8:22 PM

all possible ways = 8!
john goes before + john goes after = 8!
therefore john goes after = 8!/2

another way of doing this is
BJXXXXXX
BXJXXXXX
BXXJXXXX...
BXXXXXXJ
6! X 7

XBJXXXXX
XBXJXXXX
XBXXJXXX...
XBXXXXXJ
6! X 6

last set would be

XXXXXXBJ

overall = 6!(7+6+5+4+3+2+1) = 20160

Etude · 29 Oct 2008, 8:26 PM

ahh now i see, thanks

ronash · 29 Oct 2008, 10:04 PM

ahhhhhhh die terry lee

29 Oct 2008, 5:59 PM	#33 (permalink)
rheno New Member HSC: 2008 Gender: Female Join Date: Nov 2006 Posts: 13 Last Activity: 8 Mar 2009, 9:47 AM	Re: Terry Lee's Answers to 2008 Hsc Maths Ext 1 Exam ohh...i got it now!! huhuhu...i got another one wrong!!!argh

29 Oct 2008, 6:26 PM	#36 (permalink)
glockenspiel New Member HSC: 2008 Gender: Male Join Date: Nov 2007 Posts: 16 Last Activity: 4 Oct 2009, 9:28 PM	Re: Terry Lee's Answers to 2008 Hsc Maths Ext 1 Exam I'm going to be honest, I don't remember what I put for everything, but I think I got ~81-83. So stoked! What would that scale to?

29 Oct 2008, 6:28 PM	#37 (permalink)
scott.syd New Member HSC: 2008 Gender: Male Join Date: Sep 2007 Posts: 18 Last Activity: 2 Feb 2009, 9:31 AM	Re: Terry Lee's Answers to 2008 Hsc Maths Ext 1 Exam yay. 80/84.

29 Oct 2008, 8:05 PM	#38 (permalink)
Etude New Member HSC: 2008 Gender: Male Join Date: May 2008 Posts: 10 Last Activity: 18 Dec 2008, 11:38 AM	Re: Terry Lee's Answers to 2008 Hsc Maths Ext 1 Exam Isnt the answer to 4)b)ii) 7! not 8!/2!

29 Oct 2008, 8:11 PM	#40 (permalink)
Etude New Member HSC: 2008 Gender: Male Join Date: May 2008 Posts: 10 Last Activity: 18 Dec 2008, 11:38 AM	Re: Terry Lee's Answers to 2008 Hsc Maths Ext 1 Exam the question says "if John goes through the doorway after Barbara" so how can john go before barbara

29 Oct 2008, 8:16 PM	#42 (permalink)
Etude New Member HSC: 2008 Gender: Male Join Date: May 2008 Posts: 10 Last Activity: 18 Dec 2008, 11:38 AM	Re: Terry Lee's Answers to 2008 Hsc Maths Ext 1 Exam dividing by 2 implies you can have john first then barbara or barbara first then john. the qn states john goes thru after barbara, that means barbara first then john so how can the 2 swap.

29 Oct 2008, 8:22 PM	#43 (permalink)
hodarrenkm Junior Member HSC: 2008 Gender: Male Join Date: Aug 2006 Posts: 25 Last Activity: 10 Feb 2010, 4:19 AM	Re: Terry Lee's Answers to 2008 Hsc Maths Ext 1 Exam all possible ways = 8! john goes before + john goes after = 8! therefore john goes after = 8!/2 another way of doing this is BJXXXXXX BXJXXXXX BXXJXXXX... BXXXXXXJ 6! X 7 XBJXXXXX XBXJXXXX XBXXJXXX... XBXXXXXJ 6! X 6 last set would be XXXXXXBJ overall = 6!(7+6+5+4+3+2+1) = 20160

29 Oct 2008, 8:26 PM	#44 (permalink)
Etude New Member HSC: 2008 Gender: Male Join Date: May 2008 Posts: 10 Last Activity: 18 Dec 2008, 11:38 AM	Re: Terry Lee's Answers to 2008 Hsc Maths Ext 1 Exam ahh now i see, thanks

29 Oct 2008, 10:04 PM	#45 (permalink)
ronash Junior Member HSC: 2008 Gender: Male Join Date: Dec 2007 Posts: 31 Last Activity: 29 Jan 2009, 10:33 PM	Re: Terry Lee's Answers to 2008 Hsc Maths Ext 1 Exam ahhhhhhh die terry lee

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