Induction Question (1 Viewer)

smithers_hd

New Member
Joined
Sep 8, 2005
Messages
1
Gender
Male
HSC
2006
What the Hell? That was the hardest induction question Ive seen in an Ext1 exam yet, especially for a question 5! I was able to get out the Ext2 question 7 induction on Mon but i had no idea where to start. What did everyone else think?
 

lisraeli

Member
Joined
Nov 3, 2005
Messages
53
Location
Vaucluse
Gender
Male
HSC
2006
Wasn't too bad... just had to add one and minus one get the the result in part i). I think I may have fudged the last line but I think I should get 3 for it, at least 2.
 

Sober

Member
Joined
Dec 6, 2005
Messages
215
Gender
Male
HSC
2003
You had to use the previously proven equality. It was quite tedious I agree.
 

Riviet

.
Joined
Oct 11, 2005
Messages
5,595
Gender
Undisclosed
HSC
N/A
smithers_hd said:
What the Hell? That was the hardest induction question Ive seen in an Ext1 exam yet, especially for a question 5! I was able to get out the Ext2 question 7 induction on Mon but i had no idea where to start. What did everyone else think?
It was tricky and messy, and was hard work for 3 marks. Enough said. :(

However, I did get it in the end. :D
 

Kahlalala

New Member
Joined
Oct 18, 2006
Messages
5
Location
Tamworth
Gender
Female
HSC
2006
Considering I couldn't even show it for n=1...I pretty much fudged it....I pretended to prove each part and then wrote a wicked conclusion! Considering the middle part is only worth one mark, that's the way to go I reckon!
 

slix_88

Member
Joined
May 26, 2004
Messages
42
Location
Sydney
Gender
Male
HSC
2006
smithers_hd said:
What the Hell? That was the hardest induction question Ive seen in an Ext1 exam yet, especially for a question 5! I was able to get out the Ext2 question 7 induction on Mon but i had no idea where to start. What did everyone else think?
It wasn't really that hard. It was obvious from part (i)'s "show" question, that there was obviously some way you could incorporate it into proving the induction. It was short, but i reckon it all comes down to luck.

:D
 

silentprayer

silently praying
Joined
Dec 18, 2004
Messages
48
Gender
Male
HSC
2006
lol this induction question is definitely harder than the one in the 4u paper... just to prove n=1 took awhile which usually should be just 1 or 2 steps

but at the end it's still do-able providing no silly mistakes
 

roosterssuck

New Member
Joined
Apr 22, 2006
Messages
12
Gender
Male
HSC
2006
nah the induction question was fine, it was the bloody thing above it that was a pain in the arse...
 

mpar6704

New Member
Joined
Oct 25, 2005
Messages
2
Gender
Male
HSC
2006
Question wasnt hard just extremely time consuming. One for the 4u peoplez i guess.. .
 
Joined
Mar 29, 2006
Messages
41
Gender
Male
HSC
2006
mpar6704 said:
Question wasnt hard just extremely time consuming. One for the 4u peoplez i guess.. .
Yeah, compared to Monday's induction question, this one was a stroll in the park.
 

XcarvengerX

Chocobo
Joined
Oct 31, 2005
Messages
378
Location
Sydney
Gender
Male
HSC
2006
Didn't attempt :D

After 2 minutes of trying to prove true for n=1, I gave up, it is only 3 marks, I only have less than 30 minutes left and I haven't looked at Question 6 and 7, so skipped it and at the end have no time to go back... Hopefully 1 mark for rambling though...:D
 

toadstooltown

1337 }{4><
Joined
May 1, 2005
Messages
138
Gender
Undisclosed
HSC
N/A
The induction question was actually really easy if you went about it in the correct way, which wasn't very obvious. i) could be done in 2 or so steps if you didn't expand but collect the LHS.
The hardest part of ii) was showing true for n=1. For n=k+1 I retardedly tried to prove LHS=RHS seperately but it could be done in about 5 lines if you put them together and just made them look like i). However these were the most obvious things to do and it took up a lot more time than it should've.
 

raikkonen_rulez

New Member
Joined
Nov 13, 2005
Messages
16
Gender
Female
HSC
2006
The hardest bit was to prove it was true for n=1, from then on it was easy.

I was trying to write too quickly and shorten a lot of steps since i had 5 mins left, so I'm not sure if the examiner can read my writing.
 

CheekyPunk

Member
Joined
Apr 4, 2006
Messages
57
Gender
Male
HSC
2006
hmmmm, i got it, though, i rushed over proving for n=1, i think i will lose one mark :(
 

f261120

New Member
Joined
May 22, 2006
Messages
10
Location
Warilla
Gender
Female
HSC
2006
Kahlalala said:
Considering I couldn't even show it for n=1...I pretty much fudged it....I pretended to prove each part and then wrote a wicked conclusion! Considering the middle part is only worth one mark, that's the way to go I reckon!
i love you.

i wrote out each step then wrote my conclusions... lol... almost felt like writing "as you can see in the extensive work, it is clearly true for n=1"

Damn MX1... lets hope i do better in the other 11 units :p
 

B35tY

Member
Joined
Feb 1, 2005
Messages
262
Location
Sydney
Gender
Male
HSC
2006
Well aren't you a lucky fuck. I got it in the end, but it was certainly one of the hardest inductions i've ever seen (which might not mean much, i'm only a 3U student)
 

konstantine'

Member
Joined
Mar 27, 2005
Messages
120
Gender
Female
HSC
2006
LottoX said:
I've this question before somewhere in the Harder 3 Unit preparation I did for my 4 unit exam. =p
Haha that's pretty lucky. I reckon the question was a pain for just 3 marks. I had to keep rewriting certain lines because I got mixed up with all the thetas and 'n's and what not. Do-able but time consuming.
 

abcd9146

Member
Joined
Dec 4, 2005
Messages
107
Gender
Male
HSC
2006
the only reason it was 'easier' was cos it had that first part... if that first part wasn;t there, then i could've sat there for 2 hours answering that one question -_-'' and only for 3 marks... :/
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top