問題文全文(内容文):
$\alpha=\cos\dfrac{2}{7}\pi+i\sin\dfrac{2}{7}\pi$
①$\alpha^6+\alpha^5+\alpha^4+\alpha^3+\alpha^2+\alpha$の値を求めよ.
②$(1-\alpha)(1-\alpha^2)(1-\alpha^3)\times(1-\alpha^4)(1-\alpha^5)$
$(1-\alpha^6)$の値を求めよ.
千葉大過去問
$\alpha=\cos\dfrac{2}{7}\pi+i\sin\dfrac{2}{7}\pi$
①$\alpha^6+\alpha^5+\alpha^4+\alpha^3+\alpha^2+\alpha$の値を求めよ.
②$(1-\alpha)(1-\alpha^2)(1-\alpha^3)\times(1-\alpha^4)(1-\alpha^5)$
$(1-\alpha^6)$の値を求めよ.
千葉大過去問
単元:
#数Ⅰ#数と式#式の計算(整式・展開・因数分解)#数学(高校生)
指導講師:
鈴木貫太郎
問題文全文(内容文):
$\alpha=\cos\dfrac{2}{7}\pi+i\sin\dfrac{2}{7}\pi$
①$\alpha^6+\alpha^5+\alpha^4+\alpha^3+\alpha^2+\alpha$の値を求めよ.
②$(1-\alpha)(1-\alpha^2)(1-\alpha^3)\times(1-\alpha^4)(1-\alpha^5)$
$(1-\alpha^6)$の値を求めよ.
千葉大過去問
$\alpha=\cos\dfrac{2}{7}\pi+i\sin\dfrac{2}{7}\pi$
①$\alpha^6+\alpha^5+\alpha^4+\alpha^3+\alpha^2+\alpha$の値を求めよ.
②$(1-\alpha)(1-\alpha^2)(1-\alpha^3)\times(1-\alpha^4)(1-\alpha^5)$
$(1-\alpha^6)$の値を求めよ.
千葉大過去問
投稿日:2021.08.31