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If z = e ^( 2pi l 3) , then 1 + z + 3z ^...

If `z = e ^( 2pi l 3) ,` then `1 + z + 3z ^(2) + 2z ^(3) + 2z ^(4) + 3z ^(5)` is equal to

A

`-3e ^(ipi//3)`

B

`3e ^( pi //3)`

C

`3e ^(2pi//3)`

D

`-3e ^(2pi //3)`

Text Solution

Verified by Experts

The correct Answer is:
A
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