hards methods i mean specialist :D questions

[hard]

anwway year has started and here is the first question regarding complex numbers:

write the following in the form of x+yi, where x and y are real numbers.
a) i⁹ +i¹⁰

Z = (i²)⁴ x i +(i²)5
   = -1⁴ x i + (-1²)⁵
   =-i + (-i)
   =-i - i
   =-2i Thus R_e=0  while I_m=-2i

hopefully i did that right 

[Glockmeister]

I've whack that in my CAS calc and I can tell you the answer is wrong.











If they ask "in the form of x+yi", you do not need to state Re(z) and Im(z).
 

[hard]

I've whack that in my CAS calc and I can tell you the answer is wrong.

oh shit what did i do wrong? can someone explain

[Glockmeister]

have a look at what I've done ahead.

[hard]

OH SHIT i see my mistake thanks glockmeister +1 coming your way

[Damo17]

HARD: what text book are you using?

[hard]

Maths quest although i'm using a photocopy of chapter 3 from my teacher so i haven't got the real book. what about you damo?

[Damo17]

Maths quest also, that was question 3a from 3A, i read it and thought it was so familiar.

[hard]

Maths quest also, that was question 3a from 3A, i read it and thought it was so familiar.

yer that one Have you started your specialist course yet damo?

[Damo17]

Yeah, we started 2 weeks of transition yesterday. Only half my GMA class had the guts to tackle specialist.

[dekoyl]

I'm jealous of the schools that offer this transition thing. I think it's a good 'kick start' for the subjects. It's harder to pick up a book and sit down to study in the holidays than it is to just start at school and continue in the holidays

[hard]

Yeah, we started 2 weeks of transition yesterday. Only half my GMA class had the guts to tackle specialist.

half lol what the hell! Only 6 kids are doing it in our school and i didn't do general advanced maths so i'm starting fresh with spesh. Seems good so far.

also i got another question to check if it is right: To damo this is q1h of chapter 3A

Using the imaginary number i, write down expression for the following


x² = -36/25
x² = -1 x 36/25
x² = i² x 36/25
x = (plusminus)
x = (plusminus) i x 6/5



EDIT: change 35>25

[shinny]

Your first step is incorrect. By stating , you're adding another answer in which is why you have the

Try this:

[hard]

Your first step is incorrect. By stating , you're adding another answer in which is why you have the

Try this:

but were did you get

[hard]

Your first step is incorrect. By stating , you're adding another answer in which is why you have the

Try this:

but were did you get

oh sorry, multiplying with the other part would not change the answer, yerp thanx shinjitsuzx