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Unformatted text preview: unity. (g) Since the exponent is greater than one, there is only one solution. To Fnd it, Frst note that (1+ i ) 2 = 2 i . Thus (1+ i ) 8 = (2 i ) 4 = 16. 5. (a) Let S = n j =0 z j . Then we have zS-S = n +1 j =1 z j-n j =0 z j = z n +1-1 . Dividing both sides by 1-z gives S = 1-z n +1 1-z (b) Noticing that cos j = e j , 4...
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This note was uploaded on 07/27/2010 for the course MATH Math2009 taught by Professor Koskesh during the Spring '09 term at SUNY Empire State.
- Spring '09