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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: complex cube root of unit....its imp.
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[Post New]4 Apr 2007 18:02:39 IST
    Subject: complex cube root of unit....its imp.
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choudhari.mayur (2)

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value of 1)a+bw+cw^2/c+aw+bw^2=?(/=its whole divided by)
w=omega,w^2=omega square.
a)w          2)w^2           3)2w          4)none
tell ans in detail.plzzzzzzzzz


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[Post New]4 Apr 2007 18:07:19 IST
    Subject: Re:complex cube root of unit....its imp.
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rajat (284)

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is the answer : B  ??
light travels the fastest ??? NO
wherever light goes it always finds that darkness has already got there
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[Post New]4 Apr 2007 19:00:20 IST
    Subject: Re:complex cube root of unit....its imp.
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rishikesh_anshu (220)

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(a+bw+cw2)/(c+aw+bw2)

multiply and divide by w

(aw+bw2+cw3)
---------------------
w(c+aw+bw2)

w3=1

so
(aw+bw2+c)                     1
---------------------  =      ---------  =w2
w(c+aw+bw2)                   w
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[Post New]4 Apr 2007 19:35:30 IST
    Subject: complex cube root of unit....its imp.
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aysh (673)

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The answer is
2)w^2

SHORTCUT>>>
Put a=b=1,c=2.
Then,
G.E.=(w^2)/1

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[Post New]4 Apr 2007 20:20:53 IST
    Subject: Re:complex cube root of unit....its imp.
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dvrravi (127)

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yeah , it's w^2

it's an a das gupta problem..
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