hardest topic (2 Viewers)

[Steph]

Originally posted by Dumbarse
i still reckon perms and combs is hardest topic, 3 or 4 unit... i have so much trouble with it, it pisses me off hard

hey i'm in more trouble here! i can't even do 2 unit perms & combs!
in my trials, i didn't attempt any of my probability questions (that's how bad i'm at them!)

 

[Steph]

Originally posted by Sazzy
MECHANICS! I hate it!! I can't do ONE question in it. Not even ONE!
I hate 4u altogether! EVERYTHING is hard! All the freakin topics! :mad1:

yeah, me too - i really dunno why i chose 4u in the first place...

REALLY, REALLY regret it!

 

[McLake]

Can I ask, who cant rember 2U topics (such as invesment payments) cause it sure can't.

 

[Weisy]

me, me!

 

[kini mini]

Have to think about it a bit sometimes, wouldn't want to count the number of payments wrongly and embarrass myself like I did a whiule back :0. But that's more of a worry in 3U, can't see that happening in 4U. Maybe an analysis of HIH finances....maybe that's creative writing

 

[flyin']

after finally finishing the course (2,3 and 4), i reckon the hardest is harder Ext 1 (in particular dodgy proofs, general probability or binomial theorem) and mechanics

 

[freestyler__54]

it all changes from person to person, i think on average...

Harder 3u is the worst

complex, graphing, & integration are giveaway marks

personally, im killing mechanics but suck at conics

 

[sths]

whus from sydney tech???????

hope everyone at sydney technical high the best of all hsc's

well beat tha sluts at stgeorge lol

jus kidding

if ur from sydney tech reply to dis !!!!!!!!!!!11

 

[McLake]

Re: whus from sydney tech???????

Originally posted by sths
hope everyone at sydney technical high the best of all hsc's

well beat tha sluts at stgeorge lol

jus kidding

if ur from sydney tech reply to dis !!!!!!!!!!!11

I'm NOT from Sydney Tech.

Go to HELL

 

[Jason]

Definitely Harder 3U - in particular inequalities (which I just make up as I go along) and induction (ditto). Also Conics are a pain - I can do them, but I get so frustrated and you can end up on the completely wrong track and stay on it for half an hour without knowing. Easiest (not to say that they're easy...) are Integration, Graphs, Mechanics (particularly resisted motion - it's just applied integration).... volumes are easy if they're straight forward - but 3D co-ordinate geometry is a bitch!!

 

[Raser]

Yeah inequalities for sure
the harder arithmetic mean geometric mean and harmonic mean questions are impossible if u haven't seen it before...

But english is still teh ahrdest subject... i rather do 10u maths and drop english

 

[wogboy]

If I had to rank the topics from easiest to hardest, I'd put them in this order:

1. Complex numbers [easiest]
2. Graphs
3. Integration
4. Volumes
5. Polynomials
6. Mechanics
7. Conics
8. Harder 3U [hardest]

 

[Dumbarse]

"the harder arithmetic mean geometric mean and harmonic mean questions are impossible if u haven't seen it before... "

whats an example??

 

[McLake]

Originally posted by Dumbarse
"the harder arithmetic mean geometric mean and harmonic mean questions are impossible if u haven't seen it before... "

whats an example??

maybe:

(a + b + c + d) / 4 = 4throot (abcd)


for harmonics , i don;t know?

 

[Dumbarse]

yeh and what would u have to find for that example?. what would the question actually state and how do u do it

 

[McLake]

Originally posted by Dumbarse
yeh and what would u have to find for that example?. what would the question actually state and how do u do it

Sorry.

Q PROVE (a + b + c + d) / 4 >= 4throot (abcd)

Answer
Using (x+y)/2 >= sqrroot (xy)

let x = a + b
let y = c + d

so (a + b + c + d)/2 >= sqrt [(a + b)(c + d)]
>= sqrt [2sqrt(ab).2sqrt(cd)]
>= sqrt [4 sqrt(abcd)]
>= 2 4throot (abcd)

so a + b + c + d) / 4 >= 4throot (abcd)

does that make sense?

 

[Raser]

yeah
but how many basic rules do you have to remember

like a^2 + b^2 >= 2ab

any others?

 

[Lazarus]

You should be able to derive most of them from what you observe in (a simplified form of) the question...

 

[Dumbarse]

"Using (x+y)/2 >= sqrroot (xy) "

are we supposed to just know that!?

where does the arithmetic,/geometric part come into it?

i hate em, they are one of those things where if u dont know how to start u cant do em, like u cant really work your way through em

can u ever solve it working backwards from the answer?
is that easier?

 

[McLake]

Originally posted by Dumbarse
"Using (x+y)/2 >= sqrroot (xy) "

are we supposed to just know that!?

where does the arithmetic,/geometric part come into it?

i hate em, they are one of those things where if u dont know how to start u cant do em, like u cant really work your way through em

can u ever solve it working backwards from the answer?
is that easier?

yes, its just the AM/GM thing with a and b replaced with x and y.

No, backwards is HELL