Book's answer .
Last edited by dwsmith; December 19th 2010 at 12:58 PM.
Reason: Error fixed
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Originally Posted by dwsmith Mr F says: This line should be =1.
Picking up from the correction:
Something is still wrong though....
The arg of z is negative and positive and modulus of z is positive and negative i.
You are solving .
That means .
That gives or
That is the answer given the by the text.
How about this?
Since neither nor are roots of the equation,
That would have been a tad bit easier.