Mathematics
Senior High
この問題が解けません解説お願いします
4
2次方程式x°+2(a+1)x+a°=0が実数解を持つときの定数aの値の範囲として、 次のう
ち正しいものはどれか。
(1) a2-1
(2) a2
2
(3) a2
(5) aS2
a
VI
1一2
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