题目内容
若命题“?x0∈R,x02+(a-1)x0+1<0”是假命题,则实数a的取值范围为______.
∵命题“?x0∈R,x02+(a-1)x0+1<0”是假命题,
∴命题“?x∈R,x2+(a-1)x+1≥0”是真命题,
即对应的判别式△=(a-1)2-4≤0,
即(a-1)2≤4,
∴-2≤a-1≤2,
即-1≤a≤3,
故答案为:[-1,3].
∴命题“?x∈R,x2+(a-1)x+1≥0”是真命题,
即对应的判别式△=(a-1)2-4≤0,
即(a-1)2≤4,
∴-2≤a-1≤2,
即-1≤a≤3,
故答案为:[-1,3].
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