Mathematics
Senior High
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問
2次不等式2x2+kx-k<0 の解がすべての実数となるような定数k
13T の値の範囲を求めよ。
▶p. 80 5 6 7
(1)
5x−x>0
4x²+3x-1<0
(2) 5x-6≦x2+8x-1<-x2+20x-1
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