OpenStudy (hysenberg):

complex number question

4 years ago
OpenStudy (hysenberg):

if complex number z satisfies mod(z-6i)=im(z) then range of [arg(z)-arg(z bar)}=?

4 years ago
OpenStudy (sidsiddhartha):

can u tell me what is the trajectory of mod(z-6i)=im(z)

4 years ago
OpenStudy (hysenberg):

i think it should be a parabola

4 years ago
OpenStudy (sidsiddhartha):

wow correct its a parabola with focus 6i and directrix as real x axis any prob? do u get it?

4 years ago
OpenStudy (hysenberg):

hmm yeah

4 years ago
OpenStudy (sidsiddhartha):

now what is min and max value of arg z??

4 years ago
OpenStudy (hysenberg):

i dont know

4 years ago
OpenStudy (sidsiddhartha):

well max(arg)=3*pi/4 and min(arg)=pi/4

4 years ago
OpenStudy (hysenberg):

ok now!!

4 years ago
OpenStudy (sidsiddhartha):

$\arg(z)-\arg(z ^{-})=2\arg(z)$ ok!!

4 years ago
OpenStudy (hysenberg):

yeah so range=pi/2,3pi/2 ?????

4 years ago
OpenStudy (sidsiddhartha):

yup :)

4 years ago
OpenStudy (hysenberg):

@experimentX take a look at this is it ok?

4 years ago
OpenStudy (experimentx):

have to see ... will take a while.

4 years ago
OpenStudy (experimentx):

let z = a+bi |z-6i| = b => a^2 + (b-6)^2 = b^2 ... okay this is parabola.

4 years ago
OpenStudy (hysenberg):

yeah it is for sure

4 years ago
OpenStudy (experimentx):

b = (a^2 + 36)/12|dw:1400357918499:dw|

4 years ago