Mathematics
Senior High
Solved
(3)から解説見てもわかりません😭
答え
(1)7
(2)±√5
(3)18
(4)123
1
a+
a
| 題 20 式の値(3)
=3のとき、次の式の値を求めよ。
***
(1) α2+
1
Q2
1
(2) α--
1
(3) α3+
1
a
(4) a5+
a3
5
a
Answers
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ありがとうございます🙇
(4)についてです
なぜ-(1/d +d)するのですか?