CHO F(X) = –2X2 + M + 2 + M – 4

câu 125: - 155 CAU TRAC NGHIEM CHUONG 4 DAI SO 10 BAT DANG THUC BAT PHUONG TRINH FILE WORD CO DAP AN
155 CAU TRAC NGHIEM CHUONG 4 DAI SO 10 BAT DANG THUC BAT PHUONG TRINH FILE WORD CO DAP AN

Câu 125:

Cho f(x) = –2x

2

+ m + 2 + m – 4 . m m để f âm với mọi .

A.

m  (–14; 2)

B.

m  (–2; 14)

C.

m  [–14;2]

D.

m < –14

m > 2