complex numbers (1 Viewer)

[shuning]

i cant do the 2nd and 3rd question. help please

 

[shaon0]

i cant do the 2nd and 3rd question. help please

i) Let z=x+iy.
Re(az)
=> Re((p+qi)*(x+iy))=1
px-qy=1

ii) (z-a)/z = 1-(a/z)
= px-qy -((p+iq)/(x+iy))
= px-qy - ((p+iq)(x-iy)/(x^2+y^2))
Since, (p+iq)(x-iy) is imaginary.
= Re(az)- (p+iq)(x-iy)/Re(z)
Then, (z-a)/z is imaginary.

Re(a(1/z))=Re((p+iq)(x-iy)/(x^2+y^2))
= (px+qy)/(x^2+y^2)
= 1

iii)
If, 1/z = 1/a
Re(a/a)=1
Thus, 1=px-qy

 

[VU-Nit]

what he said ^
lol shun guess who! M-ss--re xD
if u think complex is hard wait till u get to mechanics
its so insane so that i dropped it lol

 

[tommykins]

what? mechanics was definitely easier than complex numbers.

 

[annabackwards]

what? mechanics was definitely easier than complex numbers.

Interesting, i was told that complex and graphs were the easiest topics.

 

[Lightlessice16]

Interesting, i was told that complex and graphs were the easiest topics.

complex is a bitch

integration would have to be the easiest and most fun out of all lol

 

[x3.eddayyeeee]

i cant do the 2nd and 3rd question. help please

weren't you the guy who didnt know whether to do 2U or 3U?
yet your still able to do 4U? okayy....

 

[shuning]

what he said ^
lol shun guess who! M-ss--re xD
if u think complex is hard wait till u get to mechanics
its so insane so that i dropped it lol

my tutor said ppl who hate mechanics is cuz they always teach it b4 the hsc and no1 really has to time to study thru it, it not really that hard. Conics is harder T.T

anywayz hi mass

 

[shuning]

weren't you the guy who didnt know whether to do 2U or 3U?
yet your still able to do 4U? okayy....

u got me mixed up with some other kid ^^

 

[VU-Nit]

ill rank the subjects easiest to hardest

graphs
integration
polynomials
complex
volumes
conics
harder 3u
mechanics

 

[cyl123]

^ No way is mechanics harder than harder 3u. Mechanics is really routine based and the processes are "mechanical", harder 3u is nearly impossible to be completely prepared for cos of the massive variety of topics they can test.

My ranking from easiest to hardest:

integration
complex, tie with polynomials and graphs
volumes
mechanics
conics
harder 3u

In fact you can easily prepare for any topic other than harder 3u.

 

[shaon0]

From what i've heard. The topics from hardest to easiet are:
Polynomials
Graphs
Integration
Complex Numbers
Volumes
Mechanics
Conics
Harder 3u

 

[annabackwards]

From what i've heard. The topics from hardest to easiet are:
Polynomials
Graphs
Integration
Volumes
Mechanics
Conics
Harder 3u

Where's complex?

And from the replies above, i guess the difficulty of the subjects depends on the person.

@OP - sorry about hijacking the thread

 

[jet]

Yeah, it really does.
I would say:
Graphs and Integration tied.
Complex
Polynomials
Volumes
Mechanics
Conics
Harder 3 unit.

Some of those conics proofs are hard to get out.

 

[shaon0]

Where's complex?

And from the replies above, i guess the difficulty of the subjects depends on the person.

@OP - sorry about hijacking the thread

Sorry about that