Published by:
CGP EDU Academic Team
Published on: August 12, 2026
The value of the expression
+ 
+
+…..+ 
Where ω is an imaginary cube root of unity, is -
A
B
C
D
None
Text Solution
Verified by ExpertsThe correct answer is:
A
T k = 
= (k + ω 2 ) (k + ω )
= k 2 + k( ω + ω 2 ) + ω 3 = k 2 + k(–1) + 1 = k 2 – k + 1.
∴ Sum = T 1 + T 2 + ….. + T n
= 
= 
– 
= 
– 
+ n = 
.
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