Mathematics
Senior High
Resolved
上の式変形が分かりません
解説お願いします
2−2(a+1)x+α²+2a≦0 より (x-a){x-(a+2)}≦ 0
a <a +2がいえるので,
これが大切
a≦x≦a+2
...
2
① ②が共通部分をもつ条件け
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