Mathematics
Senior High
囲んだ所がなぜそうなるのか分かりません
# (1) a5 = cos 2n + isin 2π = 1
左辺を因数分解すると
2
.2
コ
3
3
3
α5-1=0
よって
(a-1)(a¹ + a³ + a² +a+1)=0
Answers
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