Sketching Solutions for Absolute Value of (w-2j) = 3

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SUMMARY

The discussion focuses on solving the equation |w - 2j| = 3, where w is a complex number. The user applies a similar approach to the absolute value of real numbers, leading to the equations w - 2j = 3 and -(w - 2j) = 3. The solutions derived are w = 3 + 2j and w = -3 + 2j. The user contemplates the geometric representation of these solutions on the complex plane, recognizing that the absolute value represents the magnitude of the complex number.

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  • Knowledge of vector representation in mathematics.
  • Basic skills in sketching graphs of complex functions.
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  • Study the geometric interpretation of complex numbers on the Argand plane.
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salman213
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1. Question: Sketch the solution to

absolutevalueof*(w-2j) = 3



now if i had this type of question

absolute(x-3) = 4

i would go

x-3 if x greater than 3
-(x-3) if x less than 3
and solve separately

x = 7 and x = -1



Now should i do the same approach to this question I am a little confused :(




(w-2j) if w is greater than 2j
-(w-2j) if w is less than 2j


w = 3 + 2j

and

w = -3 + 2j

are those the only two solutions ?

and if so how do i sketch them ?

should I just make an imaginary and real axis and draw two `vectors` with the above components...
 
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or actually i just noticed that absolute value is probably the magnitude of that complex number...hmmmm

thats weird should how I approach that then :S
 
salman213 said:
or actually i just noticed that absolute value is probably the magnitude of that complex number...hmmmm

thats weird should how I approach that then :S

The difference of two numbers a - b, is a vector from b to a. The absolute value is the distance. What is the locus of the points that are at a distance 3 for the point 2j?
 

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