Search results

Nah for question 7, I kinda think I should change the question to make it seem more a root of unity question. They give you (2+3i)^3 = -46 +9i & z^3 = -46 +9i ------> which both looks the same (-46+9i. Therefore:) z^3= -46 +9i (sub in (2+3i)^3 = -46+9i) z^3 = (2+3i)^3 (Both have the...

Oh I understand. Can you solve this hard one? 4. w is a complex cube root of 1. Show w^2 is also a root. Find the value of 1+w+w^2. Hence find the value of (1+2w+3w^3)(1+2w^2+3w). 5. Show solutions of equation (z+1)^4=4(z-1)^4 are 1+-2i and 1/5(1+-2i) 6. Find the quadratic equation, with...

Hey @integral95, how would you use S.O.R in question 3?

Nice nice bro!

And for 1b. Can't you just show w^2 + w + 1=0 Cant you just factorise w^3-1=0? (w-1)(w^2+w+1)=0 therefore, w^2 +w+1=0

Oh did you sub in roots for w? W has 3 roots, which one did you use exactly?

Hey Axio, could you explain how in 1c. How, w^12 = cis8pi = 1?

I might be wrong, is it right @ledamn?

Nope, it's wrong. Question 6 is an isosceles right angled triangle at q. But I don't know how to show working out though

Yeah I think for 2B, it refers to the diagram in 2A

Hey FzzyCyst! I was wondering if I could join your Saturday 2pm class!

3:30 - Comes home 3:30-4:30 - Dinner, checking emails, BOS, Facebook, television shows. 4:30 -7 - Finishing off homework, extra study, usually doing 10 reps of pushups after each question, reading etc. 5minutes break for every 30 minutes study. 7-8/8:15 - Exercising 8:30 - 9 - Dinner 9 - 11...

Pm'd!

Re: HSC 2014 4U Marathon - Advanced Level Anyone wanna solve?

|z| = squareroot(1+ (squareroot(3)^2) = squareroot(1+3) = 2

Re: HSC 2014 4U Marathon - Advanced Level http://community.boredofstudies.org/attachments/14/mathematics-extension-2/30921d1411026981-complex-numbers-help-photo-1.jpg

Thanks a lot for your help! Yeah, I'm 50% finished with Complex Numbers. Just doing some practice questions, and this caught by eye. Thanks anyways!

Hey guys! It would really be great if you guys helped me out with a few questions that I can't do. If you're helping me, please show working out so I know how to get there! Thanks! The questions are : 1. If z is a complex number where neither Re(z) or Im(z) is zero and it is given that...

Good idea^

HAHAHA, not for my year 10 anything really. Just interested in your views on Pauline Hanson