Mathematics
Senior High
なぜ下の写真の内容は成り立つのでしょうか。教えてください
8+8+x=
$ (S+x) SI=
■ 3次関数 f(x) が極値を
もつ⇔2次方程式
f'(x) = 0 が異なる2つ
の実数解をもつ。
よ
た
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