Complex number solution (conjugate confusion): conjugateof(z) = 2*z + (1 - i)

In summary, to find all complex solutions to the equation \overline{z}=2z+1-i, you can let z=a+bi and equate the real and imaginary parts on both sides of the equation, resulting in the solution z=-1+\frac{1}{3}i.
  • #1
mackhina
8
0

Homework Statement



Find all complex solutions to:
conjugateof(z) = 2*z + (1 - i)

Homework Equations





The Attempt at a Solution



conjugateof(z) = 2*z + (1 - i)

I make:
z = (a + bi)
and
conjugateof(z) = (a - bi)

which gives:
(a - bi) = 2*(a + bi) + (1 - i)

then to find the roots:
0 = a + 3*bi + 1 - i
and that's where I get lost, I get the feeling I'm going in the right direction, but I don't seem to be able to reason out the right answer which in my book is:
z - -1 + (1/3)i

Any help would be heaps appreciated. Thanks in advance!

Cheers

Mick
 
Last edited:
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  • #2
You have:

[tex]\overline{z}=2z+1-i[/tex]

then letting z=a+bi:

[tex]-a-3bi=1-i[/tex]

now equate real and imaginary parts on both sides of that equation.
 

Related to Complex number solution (conjugate confusion): conjugateof(z) = 2*z + (1 - i)

1. What is a complex number?

A complex number is a number that can be written in the form a + bi, where a and b are real numbers and i is the imaginary unit (i.e. √-1).

2. What is a conjugate of a complex number?

The conjugate of a complex number a + bi is the complex number a - bi. In other words, the conjugate has the same real part but the imaginary part is the opposite sign.

3. How do you find the conjugate of a complex number?

To find the conjugate of a complex number, simply change the sign of the imaginary part. For example, the conjugate of 4 + 2i is 4 - 2i.

4. What is the significance of conjugates in complex number solutions?

Conjugates are important in complex number solutions because they help us find the imaginary part of a complex number by canceling out the imaginary unit. In other words, if a complex number and its conjugate are added together, the result will have no imaginary part.

5. How do you solve for the complex number when given its conjugate?

To solve for the complex number when given its conjugate, you can use algebraic methods. In this case, we can rewrite the equation conjugateof(z) = 2*z + (1 - i) as z = (conjugateof(z) - (1 - i))/2. This will give us the complex number z that satisfies the equation.

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