Complex Numbers
If ω is a cube root of unity, then (1 + ω - ω²)⁶ equals
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About This Question
- Subject
- mathematics
- Chapter
- complex numbers and quadratic equations
- Topic
- complex numbers
- Difficulty
- Hard
- Year
- 2025
Solution
Correct Answer:
64
- Core Identity: For cube roots of unity, 1+ω+ω2=0⟹1+ω=−ω2.
- Simplify Base:
- (1+ω−ω2)=(−ω2−ω2)
- =−2ω2.
- Exponentiation:
- (−2ω2)6=(−2)6⋅(ω2)6
- =64⋅ω12
- Final Result: Since ω3=1, ω12=(ω3)4=14=1.
- Result =64×1=64.
This hard difficulty mathematics question is from the chapter complex numbers and quadratic equations, covering the topic of complex numbers. It appeared in the 2025 exam.
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