Argand diagrams

[trueblue11]

just a few tips for argand diagram:
1) mod.z < =a, then the circle should be shaded
2) mod.z < a, then the circle should be shaded+dotted boundary
3) (mod.z -(a-bi)) = (mod.z), then, line should be dotted
4) (mod.z-(a-bi)) < (mod.z), then the line as well as the perpendicular.bisector should also be dotted
5) if the above is true when z=0, shade in the 'origin' side

but not sure about no.4. what happens if (mod.z-(a-bi))<=(mod.z)?? should the perpendicular bisector line be dotted? same as no. 4? ppl, write up..

 

[Mortal9090]

http://www.mathcentre.ac.uk/topics/comp ... d-diagram/

 

[awesome94]

we dint do anything abt dotted or non dotted... are you sure???

 

[ahmed t]

dont understand the 5th point
shade the "origin side"?

 

[trueblue11]

yeah, dotted circles needed. what i meant in the 5th point is, when we draw a line, the origin lies either above or below the line. if the eqn turns out true when we substitute z as 0, shading is done in the part where the origin lies..

 

[awesome94]

o ahmed t. for the argand diagram did u draw dotted circle??

 

[WellWIshER]

OH !!! CRAP!!!

I DIDNT EVEN DRAW DA DOTTED LINE!!

 

[awesome94]

i just found out abt it yesterday... i dont think the mark schemes would be that specific tho... wat did u shade??

 

[WellWIshER]

I HOPE SO cuz i never saw in da mark scheme!!!!

stating dotted lines

 

[awesome94]

lol its okay.. nothing anyone can do abt it now.. lets hope the examiner by mistake damages our papers then he will have to give us full marks.. or something like that...
idk man! i just hope my grade doesnt drop further... InshaAllah

 

[ahmed t]

actually they should be dotted but i cheked in earlier past papers and they dont reduce marks for the dots
so thats good