regarding complex numbers in the form xyi (1 Viewer)

[fuckit1991]

why is it that a complex number in the form |xyi| is simplified to |x|*|y|?

 

[shuning]

|xyi|
= |xy| (because the absolute value of i is 1 )
=|y| *|x|

it's bascilly the same as algebra equation, but they changed the brackets into absolute value signs.

 

[fuckit1991]

omg i kept thinking absolute value of i was -1. smacks head a thousand times. thanks a bunch.

 

[shuning]

xDD

 

[viviansidiss]

Ey Shuning, we do exact same subjects (except for chinese) haha

 

[Timothy.Siu]

|xyi|
= |xy| (because the absolute value of i is 1 )
=|y| *|x|

it's bascilly the same as algebra equation, but they changed the brackets into absolute value signs.

i dont know what ur talking about

its because mod (xyi)=sqroot((xy)^2)=|xy|=|x|*|y|

 

[wantingtoknow]

Are you sure |i| = 1? :S

EDIT: Yeah, I was going to post what Timothy posted until I saw the post above o_o

 

[Trebla]

|i| means the modulus of i. If you sketch a vector of i on the Argand diagram the modulus is clearly 1.
Also, using |x + iy| = √(x² + y²), when x = 0, y = 1
|i| = √(0² + 1²) = 1

 

[GUSSSSSSSSSSSSS]

yeh shuning wat a math gun

maybe teacher might give you some attention now ey lol

 

[wantingtoknow]

|i| means the modulus of i. If you sketch a vector of i on the Argand diagram the modulus is clearly 1.
Also, using |x + iy| = √(x² + y²), when x = 0, y = 1
|i| = √(0² + 1²) = 1

Oh yeah, true. I didn't think of it that way

 

[Timothy.Siu]

yeh shuning wat a math gun

maybe teacher might give you some attention now ey lol

|xyi|
= |xy| (because the absolute value of i is 1 )
=|y| *|x|

it's bascilly the same as algebra equation, but they changed the brackets into absolute value signs.

yeah right. same as an algebra equation yeah except they changed brackets to absolute????

 

[trailblazer]

yeah right. same as an algebra equation yeah except they changed brackets to absolute????

wut

 

[GUSSSSSSSSSSSSS]

yeah right. same as an algebra equation yeah except they changed brackets to absolute????

lol sorry the english is sorta bad but he need encouragement

the teacher is finally noticing him in class

he on the way up lol