Mathematics
Senior High
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18 解の判別 (Ⅱ)
X
αを実数とする。3つの2次方程式
1²-2ax+1=0
-①
2-2ax+2a=0
2
X
41²-8ax+8a-3=0
・③
のうち,1つだけが虚数解をもち、他の2つは実数解をもつよう
なαの値の範囲を求めよ.
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