Question

下列不等式中无解的一个是(    )

A.2x²-3x+2＞0                                B.x²+4x+4≤0

C.4-4x-x²＜0                                   D.-2+3x-2x²＞0

Answer 1

D

解析:-2+3x-2x²＞02x²-3x+2＜0,Δ=3²-4(-2)(-2)=-7＜0.