Sum
For z = 2 + 3i verify the following:
`("z" + bar"z")` is real
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Solution
`("z" + bar"z")` = (2 + 3i) + (2 – 3i)
= 2 + 3i + 2 – 3i
= 4, which is a real number
∴ `"z" + bar"z"` is real.
Concept: Argand Diagram Or Complex Plane
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