Draft solutions to Q8 (1 Viewer)

Trebla

Administrator
Administrator
Joined
Feb 16, 2005
Messages
8,114
Gender
Male
HSC
2006
As a continuation of what I posted in the other thread. (I know someone just posted another one up but this is typed in LaTeX! Not written! :p)

DISCLAIMER: I do not guarantee the correctness of these answers. If there is any error, let me know or post up the correction yourself.

Question 8a)



Question 8b)

i)


ii)


iii)


Question 8c)

i)


ii) Courtesy of mma03 after realising my own solution had an error



An alternative, courtesy of largarithmic






Question 8d)




 
Last edited:

mma03

New Member
Joined
Jan 18, 2011
Messages
4
Gender
Male
HSC
2003
This is where we go to find the most mathematically correct (maybe not as Loltastic as mine) solution...is there and embed latex feature on this forum? How did you put them up Trebla?
 

clementc

Awesome Member
Joined
Jan 31, 2011
Messages
146
Location
My couch
Gender
Male
HSC
2011
Uni Grad
2016
Yeah, you simply click the "fx" button in the posting area
or type in the LaTeX code between the tags [tax] and [/tax]
replace tax with tex LOL. it wouldnt stop recognising the tex as a command
 
Last edited:

largarithmic

Member
Joined
Aug 9, 2011
Messages
202
Gender
Male
HSC
2011
I don't think just doing the geometric series will get full marks because there are obviously cases where |b| = 1. A neat way to avoid that though is:


So:

but
From which the result immediately follows as we can divide by the sum b^i, since |b|>=0 and 1>0.
 

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

Top